What clothing should I wear for tai chi?
Comfortable and loose-fitting clothing that won't restrict your movements are best. Sweatpants, tights, or leotards, and a T-shirt will do. Although it doesn't look like lots of work because the movements are so slow, you may work up a sweat, and so I don't recommend overdressing.
What precautions should I take before practicing tai chi?
Tai chi is gentle enough for almost everyone. However, if you have arthritis that affects your joints (the Arthritis Foundation recommends tai chi), orthopedic conditions that limit your mobility (back pain, sprains, fractures, and severe osteoporosis), if you're pregnant, if you have a hernia, or if you have any other medical condition that might be affected by exercise, then it's a good idea to speak with your doctor before you try tai chi. If you're concerned about the class that you're considering, then watch the class or speak with the instructor before you start. You want to feel comfortable with the activity, so speak up!
What have you got to lose?
That's tai chi. Practicing it regularly can improve your aerobic capacity, muscular strength, flexibility, and balance; and it can improve your well-being and decrease your stress. It's a martial art that has been practiced for centuries by millions of Chinese. Could all of them be wrong? My suggestion is to give it a try. You've got a lifetime of fitness ahead of you, and so adding something new and different to your fitness skills that has this much potential is probably worth a try. It's worth the effort!
Sunday, October 14, 2007
Thursday, October 11, 2007
Tai Chi - 3
How much tai chi should I do?
There's not enough research to suggest what the optimal dose of tai chi is to accrue benefits. Studies have shown effects with as few as one hour of training per week, although I believe that for many individuals two to three times per week, at least in the beginning, is probably an effective dose since there is a fair amount to learn (like learning how to dance). It is the conventional wisdom in tai chi circles that a person needs at least one year of tai chi before one becomes proficient.
How do I get started with tai chi?
Tai chi is becoming more popular in the United States as Americans look for new and different ways to exercise. Video tapes are one way to get started with tai chi. Check http://www.taichihealth.net/ and http://www.collagevideo.com for a selection of tai chi tapes; everything from tai chi for seniors to urban tai chi. Although I frequently recommend video tapes, you may be better served learning tai chi hands on...that is, with an instructor. The movements should be done properly, and a watchful instructor might be better at helping you than a video tape if you have difficulty with movement. Check your local community recreation center, health club, martial arts studio, Y, or senior center for tai chi classes. Of course, if there are no classes in your area, then a video tape is the next best thing. As I mentioned, there are several styles of tai chi. The wu style seems best for balance and fall prevention, but your choices may be limited, and so I suggest that you practice whatever is available to you. As tai chi gains in popularity, your options may increase, but you may not have a choice for now. However, since all styles of tai chi involve slow, flowing movements with attention to breathing, you'll benefit from whatever style you can find.
There's not enough research to suggest what the optimal dose of tai chi is to accrue benefits. Studies have shown effects with as few as one hour of training per week, although I believe that for many individuals two to three times per week, at least in the beginning, is probably an effective dose since there is a fair amount to learn (like learning how to dance). It is the conventional wisdom in tai chi circles that a person needs at least one year of tai chi before one becomes proficient.
How do I get started with tai chi?
Tai chi is becoming more popular in the United States as Americans look for new and different ways to exercise. Video tapes are one way to get started with tai chi. Check http://www.taichihealth.net/ and http://www.collagevideo.com for a selection of tai chi tapes; everything from tai chi for seniors to urban tai chi. Although I frequently recommend video tapes, you may be better served learning tai chi hands on...that is, with an instructor. The movements should be done properly, and a watchful instructor might be better at helping you than a video tape if you have difficulty with movement. Check your local community recreation center, health club, martial arts studio, Y, or senior center for tai chi classes. Of course, if there are no classes in your area, then a video tape is the next best thing. As I mentioned, there are several styles of tai chi. The wu style seems best for balance and fall prevention, but your choices may be limited, and so I suggest that you practice whatever is available to you. As tai chi gains in popularity, your options may increase, but you may not have a choice for now. However, since all styles of tai chi involve slow, flowing movements with attention to breathing, you'll benefit from whatever style you can find.
Tai Chi - 2
What are the benefits of tai chi?
In China, it is believed that tai chi can delay aging and prolong life, increase flexibility and strengthen muscles and tendons, and aid in the treatment of heart disease, high blood pressure, arthritis, digestive disorders, skin diseases, depression, cancer, and many other illnesses. Unfortunately, there hasn't been a good deal of scientific evidence to support all of these claims. In a special study of tai chi called a meta-analysis, where many studies on one subject are reviewed, the author concludes that although there is some evidence to support the positive effects of tai chi on health, fitness, and balance and falling, most of the studies are limited by small numbers of subjects and wide variation in the type and duration of tai chi used. With that said, here are some of the documented benefits.
Balance and falling
Most of the research on tai chi has been done in older individuals in the area of balance and fall prevention. This area of research is important because fall-related injuries are the leading cause of death from injury and disabilities among older adults. The most serious fall injury is hip fracture; one-half of all older adults hospitalized for hip fracture never regain their former level of function. Because tai chi movements are slow and deliberate with shifts of body weight from one leg to the other in coordination with upper body movements (sometimes with one leg in the air), it challenges balance and one could speculate that it would help improve balance and reduce fall frequency. This has been shown in some research.
One study compared men age 65 and older who had more than 10 years of experience practicing tai chi and no involvement in any other regular sports and physical activity, with similar-aged men who had not practiced tai chi or any other physical activities (they were sedentary). It was found that the men who studied tai chi performed better on tests of balance, flexibility, and cardiovascular function. In another study involving 22 men and women aged 22 to 76 years with mild balance disorders, it was found that eight weeks of tai chi training significantly improved function on a standard balance test (called the Romberg test).
Fear of falling and improvement in self-confidence
In an interesting twist on studies of falling, researchers found that the frequency of fear of falling was reduced from 56% to 31% in a large group of adults 70 years and older who practiced tai chi regularly. Confidence about not falling, and self-confidence in general, may be an unintended benefit of tai chi but one that is certainly worth pursuing. In a similar tai chi study of older adults, 54% of the subjects who practiced tai chi attributed their improved sense of confidence to improved balance. The authors concluded that "when mental as well as physical control is perceived to be enhanced, with a generalized sense of improvement in overall well-being, older persons' motivation to continue exercising also increases."
Strength and endurance
A recent study of adults in their 60s and 70s who practiced tai chi three times a week for 12 weeks (60-minute classes) were given a battery of physical-fitness tests to measure balance, muscular strength and endurance, and flexibility before and after the 12 weeks. Statistically significant improvements were observed in all balance, muscular strength and endurance, and flexibility measures after six weeks, and they increased further after 12 weeks. The authors of the study concluded that tai chi is a potent intervention that improved balance, upper- and lower-body muscular strength and endurance, and upper- and lower-body flexibility in older adults.
Aerobic capacity
Aerobic capacity diminishes as we age, but research on traditional forms of aerobic exercise show that it can improve with regular training. In another meta-analytic study, researchers looked at seven studies focusing on the effects of tai chi on aerobic capacity in adults (average age 55 years). The investigators found that individuals who practiced tai chi for one year (classical yang style with 108 postures) had higher aerobic capacity than sedentary individuals around the same age. The authors state that tai chi may be an additional form of aerobic exercise.
Walking
Walking speed decreases with age and research suggests that it may be associated with an increased risk of falling. In only one study, however, was it found that individuals who practiced tai chi walked significantly more steps than individuals who did not. Walking is clearly associated with a decreased risk of cardiovascular disease, diabetes, and other chronic illness, and so if tai chi can improve walking, then it's certainly worth giving it a try.
Fibromyalgia
Fibromyalgia (FM) is one of the most common musculoskeletal disorders and is associated with high levels of impaired health and painful symptoms that frequently flair up without relief. The cause of FM is unknown, and there is no known cure. In a study of 39 subjects with FM who practiced tai chi twice weekly for six weeks (one-hour classes), it was found that FM symptoms and health-related quality of life improved significantly after the study. This should be good news for individuals who suffer from this disorder.
Stress
The demands of living are stressful for adults of all ages. Although one can't point to studies showing a reduction in stress from practicing tai chi (although in one study subjects who practiced tai chi did report that mental control was one of the benefits), the breathing, movement, and mental concentration required of individuals who practice tai chi may be just the distraction you need from your hectic lifestyle. The mind-body connection is one that deserves attention, as it has been reported that breathing coordinated with body movement and eye-hand coordination promote calmness. I know that when I practice yoga or tai chi, the inner sense of peace and calm is indisputable, and so I suggest that you give tai chi a chance if you're looking for a creative and physically active way to reduce how you mentally and physically respond to stress.
Some more reasons to practice tai chi:
* Movements are low-impact and gentle and put minimal stress on your muscles and joints.
* The risk of injury is very low.
* You can do it anywhere, anytime.
* It requires very little space (no excuses apartment dwellers!) and no special clothing or equipment.
*You do it at your own pace.
*It's noncompetitive.
* It can be done in groups or by yourself (find a tai chi instructor to come to your workplace at lunch hour!).
* There are lots of movements to keep you interested, and as you become more accomplished you can add those to your routine.
In China, it is believed that tai chi can delay aging and prolong life, increase flexibility and strengthen muscles and tendons, and aid in the treatment of heart disease, high blood pressure, arthritis, digestive disorders, skin diseases, depression, cancer, and many other illnesses. Unfortunately, there hasn't been a good deal of scientific evidence to support all of these claims. In a special study of tai chi called a meta-analysis, where many studies on one subject are reviewed, the author concludes that although there is some evidence to support the positive effects of tai chi on health, fitness, and balance and falling, most of the studies are limited by small numbers of subjects and wide variation in the type and duration of tai chi used. With that said, here are some of the documented benefits.
Balance and falling
Most of the research on tai chi has been done in older individuals in the area of balance and fall prevention. This area of research is important because fall-related injuries are the leading cause of death from injury and disabilities among older adults. The most serious fall injury is hip fracture; one-half of all older adults hospitalized for hip fracture never regain their former level of function. Because tai chi movements are slow and deliberate with shifts of body weight from one leg to the other in coordination with upper body movements (sometimes with one leg in the air), it challenges balance and one could speculate that it would help improve balance and reduce fall frequency. This has been shown in some research.
One study compared men age 65 and older who had more than 10 years of experience practicing tai chi and no involvement in any other regular sports and physical activity, with similar-aged men who had not practiced tai chi or any other physical activities (they were sedentary). It was found that the men who studied tai chi performed better on tests of balance, flexibility, and cardiovascular function. In another study involving 22 men and women aged 22 to 76 years with mild balance disorders, it was found that eight weeks of tai chi training significantly improved function on a standard balance test (called the Romberg test).
Fear of falling and improvement in self-confidence
In an interesting twist on studies of falling, researchers found that the frequency of fear of falling was reduced from 56% to 31% in a large group of adults 70 years and older who practiced tai chi regularly. Confidence about not falling, and self-confidence in general, may be an unintended benefit of tai chi but one that is certainly worth pursuing. In a similar tai chi study of older adults, 54% of the subjects who practiced tai chi attributed their improved sense of confidence to improved balance. The authors concluded that "when mental as well as physical control is perceived to be enhanced, with a generalized sense of improvement in overall well-being, older persons' motivation to continue exercising also increases."
Strength and endurance
A recent study of adults in their 60s and 70s who practiced tai chi three times a week for 12 weeks (60-minute classes) were given a battery of physical-fitness tests to measure balance, muscular strength and endurance, and flexibility before and after the 12 weeks. Statistically significant improvements were observed in all balance, muscular strength and endurance, and flexibility measures after six weeks, and they increased further after 12 weeks. The authors of the study concluded that tai chi is a potent intervention that improved balance, upper- and lower-body muscular strength and endurance, and upper- and lower-body flexibility in older adults.
Aerobic capacity
Aerobic capacity diminishes as we age, but research on traditional forms of aerobic exercise show that it can improve with regular training. In another meta-analytic study, researchers looked at seven studies focusing on the effects of tai chi on aerobic capacity in adults (average age 55 years). The investigators found that individuals who practiced tai chi for one year (classical yang style with 108 postures) had higher aerobic capacity than sedentary individuals around the same age. The authors state that tai chi may be an additional form of aerobic exercise.
Walking
Walking speed decreases with age and research suggests that it may be associated with an increased risk of falling. In only one study, however, was it found that individuals who practiced tai chi walked significantly more steps than individuals who did not. Walking is clearly associated with a decreased risk of cardiovascular disease, diabetes, and other chronic illness, and so if tai chi can improve walking, then it's certainly worth giving it a try.
Fibromyalgia
Fibromyalgia (FM) is one of the most common musculoskeletal disorders and is associated with high levels of impaired health and painful symptoms that frequently flair up without relief. The cause of FM is unknown, and there is no known cure. In a study of 39 subjects with FM who practiced tai chi twice weekly for six weeks (one-hour classes), it was found that FM symptoms and health-related quality of life improved significantly after the study. This should be good news for individuals who suffer from this disorder.
Stress
The demands of living are stressful for adults of all ages. Although one can't point to studies showing a reduction in stress from practicing tai chi (although in one study subjects who practiced tai chi did report that mental control was one of the benefits), the breathing, movement, and mental concentration required of individuals who practice tai chi may be just the distraction you need from your hectic lifestyle. The mind-body connection is one that deserves attention, as it has been reported that breathing coordinated with body movement and eye-hand coordination promote calmness. I know that when I practice yoga or tai chi, the inner sense of peace and calm is indisputable, and so I suggest that you give tai chi a chance if you're looking for a creative and physically active way to reduce how you mentally and physically respond to stress.
Some more reasons to practice tai chi:
* Movements are low-impact and gentle and put minimal stress on your muscles and joints.
* The risk of injury is very low.
* You can do it anywhere, anytime.
* It requires very little space (no excuses apartment dwellers!) and no special clothing or equipment.
*You do it at your own pace.
*It's noncompetitive.
* It can be done in groups or by yourself (find a tai chi instructor to come to your workplace at lunch hour!).
* There are lots of movements to keep you interested, and as you become more accomplished you can add those to your routine.
Wednesday, October 10, 2007
Tai Chi
Introduction to tai chi
When I think "martial arts," I think kicking, punching, fighting, and body contact. Not slow, rhythmic, and meditative body movements designed to enhance relaxation, inner calm, and peace. But that's what the martial art tai chi is all about—slow, rhythmic, meditative movements designed to help you find peace and calm. In this article, I'll cover the history, philosophy, and benefits of tai chi, as well as how and where to get started, and more.
What is tai chi, and where does it come from?
Tai chi history
Tai chi is a centuries-old Chinese martial art that descends from qigong, an ancient Chinese discipline that has its roots in traditional Chinese medicine. (The people that you see moving gracefully in parks in China are practicing tai chi.) According to some records, tai chi dates back as far as 2,500 years! It involves a series of slow, meditative body movements that were originally designed for self-defense and to promote inner peace and calm. According to the tai chi historian Marvin Smalheiser, some tai chi masters are famous for being able to throw an attacker to the floor with the attacker and spectators unable to clearly see how it was done. Their movements use internal energy and movements too subtle for most people to observe, reflected in the notion that "four ounces can deflect a thousand pounds." At this high level of skill, a defender can use a small amount of energy to neutralize the far greater external force of an attacker.
Qi
In traditional Chinese medicine, human beings are considered miniature versions of the universe, and like the universe, they are thought to be made up of the constant interaction of five elements (metal, water, fire, wood, and earth). It is believed that these five elements flow in an interrelated manner throughout all the organs of the body as the five phases of universal qi (pronounced "chee"), with qi defined as the life force—the intrinsic energy in the body that travels along pathways in the body called meridians. Health is achieved when the interactions between these elements cause the flow of your qi to occur in a smooth and balanced manner. You could say that one reason you study tai chi is to help your qi flow smoothly.
Qigong
Qigong, from which tai chi (qi) originates, is a discipline that involves the mind, breath, and movement to create a calm, natural balance of energy that can be used in work, recreation or self-defense. Like yoga, where many varieties have evolved, there are more than 3,000 varieties of qigong and five major traditions: Taoist, Buddhist, Confucian, martial arts, and medical, and two major types: "soft" and "hard." Soft qigong is called inner qigong, of which tai chi is an example.
Types of tai chi
Yang, wu, and tai chi chih are three of the most popular styles of tai chi. The yang style, which includes 24 movements in its simple form (108 movements in the traditional form), is demanding because you must keep your stance wide and your knees bent most of the time; the wu style, which includes 24 to 36 movements in its shorter form (100 movements in the traditional), is gentler because it uses a narrow, higher stance where the knees are not bent as much as the yang style; and the tai chi chih style, which has 20 movements, also uses a higher stance, but with much less transfer of weight from one leg to the other than the other two. Because the wu style uses a high, narrow stance, it may be easier to do and ideal for improving balance. No matter which style you practice, they all are conducted slowly, deliberately, and gracefully, with each movement flowing seamlessly into the next without hesitation.
When I think "martial arts," I think kicking, punching, fighting, and body contact. Not slow, rhythmic, and meditative body movements designed to enhance relaxation, inner calm, and peace. But that's what the martial art tai chi is all about—slow, rhythmic, meditative movements designed to help you find peace and calm. In this article, I'll cover the history, philosophy, and benefits of tai chi, as well as how and where to get started, and more.
What is tai chi, and where does it come from?
Tai chi history
Tai chi is a centuries-old Chinese martial art that descends from qigong, an ancient Chinese discipline that has its roots in traditional Chinese medicine. (The people that you see moving gracefully in parks in China are practicing tai chi.) According to some records, tai chi dates back as far as 2,500 years! It involves a series of slow, meditative body movements that were originally designed for self-defense and to promote inner peace and calm. According to the tai chi historian Marvin Smalheiser, some tai chi masters are famous for being able to throw an attacker to the floor with the attacker and spectators unable to clearly see how it was done. Their movements use internal energy and movements too subtle for most people to observe, reflected in the notion that "four ounces can deflect a thousand pounds." At this high level of skill, a defender can use a small amount of energy to neutralize the far greater external force of an attacker.
Qi
In traditional Chinese medicine, human beings are considered miniature versions of the universe, and like the universe, they are thought to be made up of the constant interaction of five elements (metal, water, fire, wood, and earth). It is believed that these five elements flow in an interrelated manner throughout all the organs of the body as the five phases of universal qi (pronounced "chee"), with qi defined as the life force—the intrinsic energy in the body that travels along pathways in the body called meridians. Health is achieved when the interactions between these elements cause the flow of your qi to occur in a smooth and balanced manner. You could say that one reason you study tai chi is to help your qi flow smoothly.
Qigong
Qigong, from which tai chi (qi) originates, is a discipline that involves the mind, breath, and movement to create a calm, natural balance of energy that can be used in work, recreation or self-defense. Like yoga, where many varieties have evolved, there are more than 3,000 varieties of qigong and five major traditions: Taoist, Buddhist, Confucian, martial arts, and medical, and two major types: "soft" and "hard." Soft qigong is called inner qigong, of which tai chi is an example.
Types of tai chi
Yang, wu, and tai chi chih are three of the most popular styles of tai chi. The yang style, which includes 24 movements in its simple form (108 movements in the traditional form), is demanding because you must keep your stance wide and your knees bent most of the time; the wu style, which includes 24 to 36 movements in its shorter form (100 movements in the traditional), is gentler because it uses a narrow, higher stance where the knees are not bent as much as the yang style; and the tai chi chih style, which has 20 movements, also uses a higher stance, but with much less transfer of weight from one leg to the other than the other two. Because the wu style uses a high, narrow stance, it may be easier to do and ideal for improving balance. No matter which style you practice, they all are conducted slowly, deliberately, and gracefully, with each movement flowing seamlessly into the next without hesitation.
Aerobic Exercise 7
What aerobic equipment is involved?
Rowers, treadmills, bikes, and cross-country skiers are all effective if you use them! There is some suggestion that some individuals are more inclined to exercise at home with equipment than at the gym or a class. This is a personal choice and it varies for everyone, and so you need to experiment until you find what works best for you. Some individuals prefer to go to the gym while others are perfectly content to work out at home on their own equipment in front of their own TV. TV can make the time pass quickly, and so can your favorite movie, music, scholarly courses taught by professors, or books on tape (see resources for online vendors). Finding something that will distract you might just make that 30-minute workout bearable, and believe it or not you might even look forward to it! After all, it could be the only 30 minutes in your day that you have all to yourself. Indulge! Aerobic exercise videos and DVDs are also effective if you use them! They are convenient if you prefer to work out at home instead of taking class at a studio or a gym, and there are hundreds to choose from. I suggest that you check out Collage Video (http://www.CollageVideo.com), or give them a call and ask for a recommendation. Also check if your local library rents exercise videos on tape or DVD.
What are the different types of aerobics classes?
Step, funk-fusion, hip-hop, jazz, kick box, boot camp, cardio box…There are dozens of classes to choose from. They last anywhere from 30-60 minutes and vary in intensity. Here's some advice for choosing classes:
1. Classes are generally rated as beginner, intermediate, and advanced. Choose the level that fits your condition. It's no fun taking an advanced class if you're a beginner. It will be hard and frustrating and you won't enjoy the experience. Watch the class or speak with the instructor to help you decide what's right for you. Sometimes it comes down to the class time that fits your schedule, but just be sure to not get in too far over your head.2. Low-impact classes mean that one foot always stays on the ground. They are less intense than high-impact and may be more suitable if you are a beginner. Some classes are now called, "high-low" or "mixed-impact" which means they combine low and high-impact moves. Again, speak with the instructor if you're not sure.3. High-impact means both feet leave the ground, so there will be jumping and balance moves. Stick with lower-impact and more gentle and rhythmic dance classes if you are concerned about the pounding (low back problems, knee arthritis, or other joint injuries).4. Experiment until you find the classes that work best for you.
Classes are great for people who like to exercise with others, who like to dance, who like music and rhythm, who want the extra motivation and energy that an instructor and class provides, and who prefer the structure and schedule of a regular class. Classes, equipment, and videos are all great ways to stay fit and healthy, but if you're limited by injury or other conditions, then aerobic exercise chair workouts may be just the thing (see resources for online vendors). The instructor leads you through a workout in a chair and it's great exercise. You might not need chair exercise, but you may have a parent or friend who does. Exercise videos and DVDs make great gifts!
The bottom line to equipment, classes, and videos is that if they get your heart rate elevated and keep it there, then it's aerobic and it counts!
That's it!
There you have it. Aerobic exercise is awesome stuff! It strengthens your heart, makes your muscles stronger and more efficient fuel-burners, increases your endurance and your energy, improves your mood, makes you fit and healthy, and much, much more. It could take as little as 30 minutes out of your day for a tremendous payoff so I suggest giving it a shot. Follow my advice for getting started by doing only what is realistic and build up slowly. You have only health and fitness to gain, and you're worth it! Good luck!
Rowers, treadmills, bikes, and cross-country skiers are all effective if you use them! There is some suggestion that some individuals are more inclined to exercise at home with equipment than at the gym or a class. This is a personal choice and it varies for everyone, and so you need to experiment until you find what works best for you. Some individuals prefer to go to the gym while others are perfectly content to work out at home on their own equipment in front of their own TV. TV can make the time pass quickly, and so can your favorite movie, music, scholarly courses taught by professors, or books on tape (see resources for online vendors). Finding something that will distract you might just make that 30-minute workout bearable, and believe it or not you might even look forward to it! After all, it could be the only 30 minutes in your day that you have all to yourself. Indulge! Aerobic exercise videos and DVDs are also effective if you use them! They are convenient if you prefer to work out at home instead of taking class at a studio or a gym, and there are hundreds to choose from. I suggest that you check out Collage Video (http://www.CollageVideo.com), or give them a call and ask for a recommendation. Also check if your local library rents exercise videos on tape or DVD.
What are the different types of aerobics classes?
Step, funk-fusion, hip-hop, jazz, kick box, boot camp, cardio box…There are dozens of classes to choose from. They last anywhere from 30-60 minutes and vary in intensity. Here's some advice for choosing classes:
1. Classes are generally rated as beginner, intermediate, and advanced. Choose the level that fits your condition. It's no fun taking an advanced class if you're a beginner. It will be hard and frustrating and you won't enjoy the experience. Watch the class or speak with the instructor to help you decide what's right for you. Sometimes it comes down to the class time that fits your schedule, but just be sure to not get in too far over your head.2. Low-impact classes mean that one foot always stays on the ground. They are less intense than high-impact and may be more suitable if you are a beginner. Some classes are now called, "high-low" or "mixed-impact" which means they combine low and high-impact moves. Again, speak with the instructor if you're not sure.3. High-impact means both feet leave the ground, so there will be jumping and balance moves. Stick with lower-impact and more gentle and rhythmic dance classes if you are concerned about the pounding (low back problems, knee arthritis, or other joint injuries).4. Experiment until you find the classes that work best for you.
Classes are great for people who like to exercise with others, who like to dance, who like music and rhythm, who want the extra motivation and energy that an instructor and class provides, and who prefer the structure and schedule of a regular class. Classes, equipment, and videos are all great ways to stay fit and healthy, but if you're limited by injury or other conditions, then aerobic exercise chair workouts may be just the thing (see resources for online vendors). The instructor leads you through a workout in a chair and it's great exercise. You might not need chair exercise, but you may have a parent or friend who does. Exercise videos and DVDs make great gifts!
The bottom line to equipment, classes, and videos is that if they get your heart rate elevated and keep it there, then it's aerobic and it counts!
That's it!
There you have it. Aerobic exercise is awesome stuff! It strengthens your heart, makes your muscles stronger and more efficient fuel-burners, increases your endurance and your energy, improves your mood, makes you fit and healthy, and much, much more. It could take as little as 30 minutes out of your day for a tremendous payoff so I suggest giving it a shot. Follow my advice for getting started by doing only what is realistic and build up slowly. You have only health and fitness to gain, and you're worth it! Good luck!
Thursday, September 20, 2007
Aerobic Exercise 6
What are some aerobic training workouts and routines?
There are a number of ways to approach aerobic training. I'll use walking as an aerobic activity and go through some of the training methods. You can plug in any other aerobic activity if you prefer. If you're interested in running, please read the Running article.
"Simple" aerobic training
The simplest method of starting is just that, simple. Select the number of minutes you'd like to walk for (let's say 20 minutes for your first walk) and head out the door or step on the treadmill and go for it. Remember that to make it aerobic you want to walk at a pace that leaves you feeling "warm and slightly out of breath" and one that you can sustain for the time that you planned. In this case, set your sights on completing 20 minutes and pace yourself to do it. If you start too quickly, then you may poop out too soon. It's not important how fast you do it; it's just important that you attempt to complete the time. If you find 20 minutes is too ambitious, then start with less. Again, the most important thing is to get started. You can always add more later on.
Five-out, five-back training plan
Borrowing from Mark Fenton, I like the simplicity of the five-minute out, five-minute back aerobic training plan. Just like it sounds, you walk or jog out for five minutes, stop, and return to your starting place. That's it. 10 minutes and off you go about your day! If you feel ambitious you can try seven and a half out and seven and a half back, or even 10 out and 10 back. People frequently report that this isn't enough, but remember, the point is to get started; you can always add more later on.
Interval training
Interval training is more intense than simple aerobic training. It's a very effective way to increase your fitness level (remember stroke volume and mitochondria activity!), but it's tough, and so I recommend holding off until you build up to 20-30 minutes of aerobic exercise. The idea to intervals is to set up work to active-rest ratios (work:active-rest), and as you get more fit, decrease the active-rest interval and increase the work interval. The work interval of the ratio is a speed that is faster than what you usually do, and the active-rest interval is your usual speed. To do it, you start at your usual speed for five to eight minutes, then increase the speed to the work interval for one to three minutes, then slow down to your usual speed for a few minutes to catch your breath (this is the active-rest interval), and then you repeat the cycling for the duration of your workout.
Here are some examples of interval training using walking as the activity:
Training Plan #1
Try the following if you currently walk for 30 minutes at 3.5 mph on the treadmillInterval 1: 3.5 mph for five minutes to warm upInterval 2: 3.8 mph for one minuteInterval 3: 3.5 mph for three minutes to catch your breath (active-rest)Interval 4: 3.8 mph for one minuteInterval 5: 3.5 mph for three more minutes, and so on until you reach 30 minutes.
After a few weeks you can try increasing using plan #2.
Training Plan #2
The work:active-rest ratio in the above example is 1:3. Over the course of weeks and months, you increase the work interval and decrease the active-rest. For example:Interval 1: 3.5 mph for five minutes to warm upInterval 2: 3.8 mph for two minutesInterval 3: 3.5 mph for two minutes (active-rest)Interval 4: 3.8 mph for two minutesInterval 5: 3.5 mph for two more minutes, and so on until you reach 30 minutes.
Training Plan #3
The work:active-rest ratio in the above example is 1:3. Over the course of weeks and months you increase the work interval and decrease the active-rest. For example:Interval 1: 3.5 mph for five minutes to warm upInterval 2: 3.8 mph for three minutesInterval 3: 3.5 mph for one minutes (active-rest)Interval 4: 3.8 mph for three minutesInterval 5: 3.5 mph for one more minute, and so on until you reach 30 minutes.
As you can see, the ratio changed from 1:3 to 3:1 (work to active-rest). The next step would be to do all four minutes at 3.8 mph (the new active-rest) and increase the work interval for one minute to 4.0 mph.
One final note. Spin class is interval training. It's done at gyms on special spin cycles with an instructor who barks out orders to increase the intensity and then slow down to catch your breath. It's addictive, and people who do it regularly swear by it. You should already be doing some aerobic exercise and be reasonably conditioned before you try it, but I recommend it if you're looking for one of the toughest workouts around.
Heart rate training
You can get more specific with your aerobic interval training and use heart rate since it's an excellent indication of how hard you are working. Let's use jogging on a treadmill as the aerobic activity in this example. For example, if your heart rate is at 70% of your predicted maximum when you jog at 6 mph, then start at that speed and either increase the speed or elevation so that your heart rate increases to 85% or even 90% for one minute, then back to your usual jogging speed for three minutes to elicit a heart rate of 70%. Start with a 1:3 work:active-rest ratio. That's a good starting point, and as you increase the work intervals and decrease the active-rest ratios like in the examples above, you'll notice that your conditioning improves so that your heart rate will be lower at the higher speeds.
It's a good idea to plan your intervals in advance. Write them down so that you don't have to think about it while you're working out. I also suggest intervals no more than one to two times per week because they are tough workouts and you will need some time to recover. It's okay to do aerobic activity on days in between your intervals, but give your body a chance to recover from the intervals before doing them again.
Increasing duration and intensity
The general rule for increasing aerobic activity is 10% per week. Interestingly, there's no evidence to suggest that a 10% increase is the safest and most effective amount of time to increase, but that's the rule of thumb and it seems to work pretty well. So, if you're walking for 20 minutes then the next increase ought to be two minutes for the following week. The bottom line though is to listen to your body. If you find that increasing by 10% is very easy, then go ahead and try a little more. But if you find that you are tired for hours after your workout, or chronically sore or achy from your workouts, then you know you need to cut back to 10% increases. Learn how to listen to your body and everything should be okay.
There are a number of ways to approach aerobic training. I'll use walking as an aerobic activity and go through some of the training methods. You can plug in any other aerobic activity if you prefer. If you're interested in running, please read the Running article.
"Simple" aerobic training
The simplest method of starting is just that, simple. Select the number of minutes you'd like to walk for (let's say 20 minutes for your first walk) and head out the door or step on the treadmill and go for it. Remember that to make it aerobic you want to walk at a pace that leaves you feeling "warm and slightly out of breath" and one that you can sustain for the time that you planned. In this case, set your sights on completing 20 minutes and pace yourself to do it. If you start too quickly, then you may poop out too soon. It's not important how fast you do it; it's just important that you attempt to complete the time. If you find 20 minutes is too ambitious, then start with less. Again, the most important thing is to get started. You can always add more later on.
Five-out, five-back training plan
Borrowing from Mark Fenton, I like the simplicity of the five-minute out, five-minute back aerobic training plan. Just like it sounds, you walk or jog out for five minutes, stop, and return to your starting place. That's it. 10 minutes and off you go about your day! If you feel ambitious you can try seven and a half out and seven and a half back, or even 10 out and 10 back. People frequently report that this isn't enough, but remember, the point is to get started; you can always add more later on.
Interval training
Interval training is more intense than simple aerobic training. It's a very effective way to increase your fitness level (remember stroke volume and mitochondria activity!), but it's tough, and so I recommend holding off until you build up to 20-30 minutes of aerobic exercise. The idea to intervals is to set up work to active-rest ratios (work:active-rest), and as you get more fit, decrease the active-rest interval and increase the work interval. The work interval of the ratio is a speed that is faster than what you usually do, and the active-rest interval is your usual speed. To do it, you start at your usual speed for five to eight minutes, then increase the speed to the work interval for one to three minutes, then slow down to your usual speed for a few minutes to catch your breath (this is the active-rest interval), and then you repeat the cycling for the duration of your workout.
Here are some examples of interval training using walking as the activity:
Training Plan #1
Try the following if you currently walk for 30 minutes at 3.5 mph on the treadmillInterval 1: 3.5 mph for five minutes to warm upInterval 2: 3.8 mph for one minuteInterval 3: 3.5 mph for three minutes to catch your breath (active-rest)Interval 4: 3.8 mph for one minuteInterval 5: 3.5 mph for three more minutes, and so on until you reach 30 minutes.
After a few weeks you can try increasing using plan #2.
Training Plan #2
The work:active-rest ratio in the above example is 1:3. Over the course of weeks and months, you increase the work interval and decrease the active-rest. For example:Interval 1: 3.5 mph for five minutes to warm upInterval 2: 3.8 mph for two minutesInterval 3: 3.5 mph for two minutes (active-rest)Interval 4: 3.8 mph for two minutesInterval 5: 3.5 mph for two more minutes, and so on until you reach 30 minutes.
Training Plan #3
The work:active-rest ratio in the above example is 1:3. Over the course of weeks and months you increase the work interval and decrease the active-rest. For example:Interval 1: 3.5 mph for five minutes to warm upInterval 2: 3.8 mph for three minutesInterval 3: 3.5 mph for one minutes (active-rest)Interval 4: 3.8 mph for three minutesInterval 5: 3.5 mph for one more minute, and so on until you reach 30 minutes.
As you can see, the ratio changed from 1:3 to 3:1 (work to active-rest). The next step would be to do all four minutes at 3.8 mph (the new active-rest) and increase the work interval for one minute to 4.0 mph.
One final note. Spin class is interval training. It's done at gyms on special spin cycles with an instructor who barks out orders to increase the intensity and then slow down to catch your breath. It's addictive, and people who do it regularly swear by it. You should already be doing some aerobic exercise and be reasonably conditioned before you try it, but I recommend it if you're looking for one of the toughest workouts around.
Heart rate training
You can get more specific with your aerobic interval training and use heart rate since it's an excellent indication of how hard you are working. Let's use jogging on a treadmill as the aerobic activity in this example. For example, if your heart rate is at 70% of your predicted maximum when you jog at 6 mph, then start at that speed and either increase the speed or elevation so that your heart rate increases to 85% or even 90% for one minute, then back to your usual jogging speed for three minutes to elicit a heart rate of 70%. Start with a 1:3 work:active-rest ratio. That's a good starting point, and as you increase the work intervals and decrease the active-rest ratios like in the examples above, you'll notice that your conditioning improves so that your heart rate will be lower at the higher speeds.
It's a good idea to plan your intervals in advance. Write them down so that you don't have to think about it while you're working out. I also suggest intervals no more than one to two times per week because they are tough workouts and you will need some time to recover. It's okay to do aerobic activity on days in between your intervals, but give your body a chance to recover from the intervals before doing them again.
Increasing duration and intensity
The general rule for increasing aerobic activity is 10% per week. Interestingly, there's no evidence to suggest that a 10% increase is the safest and most effective amount of time to increase, but that's the rule of thumb and it seems to work pretty well. So, if you're walking for 20 minutes then the next increase ought to be two minutes for the following week. The bottom line though is to listen to your body. If you find that increasing by 10% is very easy, then go ahead and try a little more. But if you find that you are tired for hours after your workout, or chronically sore or achy from your workouts, then you know you need to cut back to 10% increases. Learn how to listen to your body and everything should be okay.
Aerobic Exercise 5
How do I calculate my target heart rate during aerobic exercise?
Heart rate reserve
Your heart beat rises during aerobic exercise. It can rise from 70 beats per minutes (bpm) at rest to as high as 170 bpm or even higher during exercise, depending on the intensity of the exercise, your fitness level, your age, and other factors. Whether you train aerobically or anaerobically is determined by the intensity of your workout, and monitoring the intensity is the key to know if you are working out aerobically.
For many individuals, simply monitoring how the body feels while exercising is enough to determine the proper aerobic intensity. I recommend "warm and slightly out of breath" as the cue for aerobic activity; that is, ask yourself if you feel warm and slightly out of breath while you're exercising and if the answer is "yes," then that's good enough.
On the other hand, some people like to know with more precision how their body is doing during exercise. If that's the case for you, then taking your heart rate during exercise and using a target heart rate training zone might be just the ticket. Target heart rate zones range anywhere from 50% to 100% of your maximum heart rate (your maximum heart rate is based on your age). Aerobic exercise is anything less than 85%, and anaerobic exercise is anything above that. A nice starting point for a sedentary individual is somewhere in the range from 50% to 65% (you can always increase as you get more fit), and 65% to 85% for more conditioned individuals.
I recommend the heart rate reserve method for calculating a target heart rate. Here's the formula and an example of the method for someone 27 years old, assuming a resting heart rate of 70 bpm, and a training range of 70%. If you plug in other values, you can get other ranges.
1. 220-age = Max HR.
2. Subtract resting heart rate from Max HR = Heart Rate Reserve (HRR).
3. Multiply HRR times percent you want to train at.
4. Add back resting heart rate.
Assuming a resting heart rate of 70bpm, 27 years old, and 70% training range:
220 - 27 = 193
193 - 70 = 123
123 x .70% = 86
86 + 70 = 156
Heart rate reserve
Your heart beat rises during aerobic exercise. It can rise from 70 beats per minutes (bpm) at rest to as high as 170 bpm or even higher during exercise, depending on the intensity of the exercise, your fitness level, your age, and other factors. Whether you train aerobically or anaerobically is determined by the intensity of your workout, and monitoring the intensity is the key to know if you are working out aerobically.
For many individuals, simply monitoring how the body feels while exercising is enough to determine the proper aerobic intensity. I recommend "warm and slightly out of breath" as the cue for aerobic activity; that is, ask yourself if you feel warm and slightly out of breath while you're exercising and if the answer is "yes," then that's good enough.
On the other hand, some people like to know with more precision how their body is doing during exercise. If that's the case for you, then taking your heart rate during exercise and using a target heart rate training zone might be just the ticket. Target heart rate zones range anywhere from 50% to 100% of your maximum heart rate (your maximum heart rate is based on your age). Aerobic exercise is anything less than 85%, and anaerobic exercise is anything above that. A nice starting point for a sedentary individual is somewhere in the range from 50% to 65% (you can always increase as you get more fit), and 65% to 85% for more conditioned individuals.
I recommend the heart rate reserve method for calculating a target heart rate. Here's the formula and an example of the method for someone 27 years old, assuming a resting heart rate of 70 bpm, and a training range of 70%. If you plug in other values, you can get other ranges.
1. 220-age = Max HR.
2. Subtract resting heart rate from Max HR = Heart Rate Reserve (HRR).
3. Multiply HRR times percent you want to train at.
4. Add back resting heart rate.
Assuming a resting heart rate of 70bpm, 27 years old, and 70% training range:
220 - 27 = 193
193 - 70 = 123
123 x .70% = 86
86 + 70 = 156
Wednesday, September 19, 2007
Aerobic Exercise 4
How much aerobic exercise do you need to do to gain the benefits?
There are two physical activity guidelines in the Unites States. The first, the Surgeon General's Report on Physical Activity and Health, is a lifestyle recommendation. That is, you can modify it to fit into your daily routine and activities of daily living. The recommendation is that all adults should accumulate 30 minutes of moderate-intensity activity on most, if not all days of the week. The key words are "accumulate" and "moderate-intensity." Accumulate means that you can do 10-15 minutes at a time and repeat that a couple of times throughout the day; for example, 10 minutes in the morning, 10 minutes at lunch, and 10 minutes around dinner.
Moderate intensity is equivalent to feeling "warm and slightly out of breath" when you do it.
The second recommendation is from the American College of Sports Medicine. The ACSM recommends 20-60 minutes of continuous aerobic activity (biking, walking, jogging, dancing, swimming, etc.), three to five times a week, at 60%-90% of maximum heart rate, and two to three days of resistance training. This is a more formal, "workout" recommendation, although you can also accumulate the more intense workout in bouts of 10-15 minutes throughout the day if you like.
Which one you choose is a personal choice. They are not intended to compete with each other, but rather provide options, and maybe even complement each other. For instance, the Surgeon General's recommendation may be more practical for individuals who are unwilling, or unable, to adopt the more formal ACSM recommendation. Of course, there's no downside to working out regularly with aerobic exercise and also becoming more physically active as per the Surgeon General (take more stairs, mow the lawn by hand, park far away from the store and walk).
How do I go about getting started with aerobic exercise?
My suggestion for getting started is almost always the same. Keep it simple, keep it practical, keep it convenient, keep it realistic, keep it specific, and don't try to make up for years of inactivity all at once. Select any activity and amount of time where the probability of sticking with it is high. You may not love walking, but if you can do it right outside your door, and it requires no special equipment, and you already know how to do it (you've been walking your entire life!), then walking might be your best bet for getting started because it's so convenient.
What I mean by "be specific" pertains to setting exercise plans. Planning is helpful for behavior change, and I suggest that you set goals each week. I suggest writing down what day(s) of the week you'll exercise, what time of day, minutes of activity, location, and the activity that you'll do. Be as specific and realistic as possible, and remember that it's not how much you do when you get started but that you simply get started (getting started is usually the hardest part).
A sample plan might look like this:
Monday: Take a 20-minute brisk walk at 7 a.m. around the block four times.
Tuesday: Do the same as on Monday.
Wednesday: Take a 20-minute walk at 6:30 p.m. (right before dinner) around the block.
Thursday: Take the day off.
Friday: Take a 20-minute walk at 7 a.m. around the block.
Saturday: Walk with your family at 10 a.m. for 45 minutes in park.
Sunday: Bike ride with your spouse for 60 minutes in park at noon. Mom will baby-sit.
I suggest keeping records of your weekly progress by writing down what happens, or at least checking off that you followed through, and then setting your weekly plan every week for at least three months. Then at three months you can evaluate your progress and see if any changes need to be made. Also ask yourself at that time if you believe you will be exercising regularly in six more months. If the answer is "I'm not sure," or "no," then you ought to continue to set weekly goals. If you are confident that you can maintain the behavior and will be exercising in six months, then you may not need to set weekly goals, but at the fist sign of slipping, you ought to go back to it.
There are two physical activity guidelines in the Unites States. The first, the Surgeon General's Report on Physical Activity and Health, is a lifestyle recommendation. That is, you can modify it to fit into your daily routine and activities of daily living. The recommendation is that all adults should accumulate 30 minutes of moderate-intensity activity on most, if not all days of the week. The key words are "accumulate" and "moderate-intensity." Accumulate means that you can do 10-15 minutes at a time and repeat that a couple of times throughout the day; for example, 10 minutes in the morning, 10 minutes at lunch, and 10 minutes around dinner.
Moderate intensity is equivalent to feeling "warm and slightly out of breath" when you do it.
The second recommendation is from the American College of Sports Medicine. The ACSM recommends 20-60 minutes of continuous aerobic activity (biking, walking, jogging, dancing, swimming, etc.), three to five times a week, at 60%-90% of maximum heart rate, and two to three days of resistance training. This is a more formal, "workout" recommendation, although you can also accumulate the more intense workout in bouts of 10-15 minutes throughout the day if you like.
Which one you choose is a personal choice. They are not intended to compete with each other, but rather provide options, and maybe even complement each other. For instance, the Surgeon General's recommendation may be more practical for individuals who are unwilling, or unable, to adopt the more formal ACSM recommendation. Of course, there's no downside to working out regularly with aerobic exercise and also becoming more physically active as per the Surgeon General (take more stairs, mow the lawn by hand, park far away from the store and walk).
How do I go about getting started with aerobic exercise?
My suggestion for getting started is almost always the same. Keep it simple, keep it practical, keep it convenient, keep it realistic, keep it specific, and don't try to make up for years of inactivity all at once. Select any activity and amount of time where the probability of sticking with it is high. You may not love walking, but if you can do it right outside your door, and it requires no special equipment, and you already know how to do it (you've been walking your entire life!), then walking might be your best bet for getting started because it's so convenient.
What I mean by "be specific" pertains to setting exercise plans. Planning is helpful for behavior change, and I suggest that you set goals each week. I suggest writing down what day(s) of the week you'll exercise, what time of day, minutes of activity, location, and the activity that you'll do. Be as specific and realistic as possible, and remember that it's not how much you do when you get started but that you simply get started (getting started is usually the hardest part).
A sample plan might look like this:
Monday: Take a 20-minute brisk walk at 7 a.m. around the block four times.
Tuesday: Do the same as on Monday.
Wednesday: Take a 20-minute walk at 6:30 p.m. (right before dinner) around the block.
Thursday: Take the day off.
Friday: Take a 20-minute walk at 7 a.m. around the block.
Saturday: Walk with your family at 10 a.m. for 45 minutes in park.
Sunday: Bike ride with your spouse for 60 minutes in park at noon. Mom will baby-sit.
I suggest keeping records of your weekly progress by writing down what happens, or at least checking off that you followed through, and then setting your weekly plan every week for at least three months. Then at three months you can evaluate your progress and see if any changes need to be made. Also ask yourself at that time if you believe you will be exercising regularly in six more months. If the answer is "I'm not sure," or "no," then you ought to continue to set weekly goals. If you are confident that you can maintain the behavior and will be exercising in six months, then you may not need to set weekly goals, but at the fist sign of slipping, you ought to go back to it.
Aerobic Exercise 3
What is the difference between aerobic and anaerobic exercise?
I defined aerobic exercise for you in the introduction. It's any activity that stimulates your heart rate and breathing to increase but not so much that you can't sustain the activity for more than a few minutes. Aerobic means "with oxygen," and anaerobic means "without oxygen." Anaerobic exercise is the type where you get out of breath in just a few moments, like when you lift weights, when you sprint, or when you climb a long flight of stairs (or a short flight if you're deconditioned!)
A caveat
Dancing, swimming, water aerobics, biking, walking, hiking, and many other activities are all examples of aerobic activities, but they can be anaerobic too if they are performed at a high enough intensity. Try riding your bike alongside Lance Armstrong in the French Alps and you'll know what anaerobic exercise means in moments. But then again, riding along on your bike at a leisurely 8-10 mph on the boardwalk at the seashore is the same activity, but at a much lower intensity, much lower heart rate, and much lower oxygen consumption, and so in this case, biking is aerobic. The bottom line is that the intensity that you perform an activity determines if it's aerobic or anaerobic.
What are the health benefits of aerobic exercise?
Perhaps no area of exercise science has been more studied than the benefits of aerobic exercise. There is a mountain of evidence to prove that regular aerobic exercise will improve your health, your fitness, and much more. Here's a partial list of the documented health benefits of aerobic exercise.
Cancer prevention
Colon cancer. Research is clear that physically active men and women have about a 30%-40% reduction in the risk of developing colon cancer compared with inactive individuals. It appears that 30-60 minutes per day of moderate- to vigorous-intensity physical activity is needed to decrease the risk, and there is a dose-response relationship, which means that the risk declines the more active you are. Breast cancer. There is reasonably clear evidence that physically active women have about a 20%-30% reduction in risk compared with inactive women. Like colon cancer, it appears that 30-60 minutes per day of moderate- to vigorous-intensity physical activity is needed to decrease the risk, and it is likely that there is a dose-response relationship as well. Prostate cancer. Research is inconsistent regarding whether physical activity plays any role in the prevention of this cancer. Lung cancer. There are relatively few studies on physical activity and lung cancer prevention. The available data suggest that physically active individuals have a lower risk of lung cancer; however, it is difficult to completely account for cigarette smoking. Other cancers. There is little information on the role of physical activity in preventing other cancers.
Cancer treatment
There's some good news for people undergoing cancer treatment. In one study, aerobic exercise performed five days per week for 30-35 minutes for six weeks at 80% of maximal heart rate reduced fatigue in women being treated for cancer. In another study, 10 weeks of aerobic exercise at 60% of maximum heart rate for 30-40 minutes, four days per week, reduced depression and anxiety in female cancer patients. Aerobic exercise isn't a panacea when it comes to cancer, but evidence suggests that it certainly can help.
Osteoporosis
Osteoporosis is a disease characterized by low bone density which can lead to an increased risk of fracture. According to the National Osteoporosis Foundation, osteoporosis is responsible for more than 1.5 million fractures annually, including over 300,000 hip fractures, 700,000 vertebral fractures, 250,000 wrist fractures, and 300,000 fractures at other sites. The good news is that exercise may increase bone density or at least slow the rate of decrease in both men and women. It may not work for everyone, and the precise amount and type of exercise necessary to accrue benefits is unknown, but there is evidence that it can help. In children there is good news, too. It seems that active children have greater bone density than sedentary children and that this may help prevent fractures later in life.
Depression
Most of us who exercise regularly understand that exercise can elevate our mood. There have been a number of studies investigating the effects of exercise on depression. In one of the most recent studies, it was shown that three to five days per week for 12 weeks of biking or treadmill for approximately 30 minutes per workout reduced scores on a depression questionnaire by 47%! It's not a substitute for therapy in a depression that causes someone to be unable to function (in which case medication and /or psychotherapy may be necessary), but for milder forms of depression, the evidence is persuasive that it can help.
Diabetes
No study has been more conclusive about the role of lifestyle changes (diet and exercise) in preventing diabetes than the Diabetes Prevention Program. It was a study of more than 3,000 individuals at high risk for diabetes who lost 12-15 pounds and walked 150 minutes per week (five 30-minute walks per day) for three years. They reduced their risk of diabetes by 58%! That's significant considering there are 1 million new cases of diabetes diagnosed each year. Aerobic exercise can also improve insulin resistance. Insulin resistance is a condition where the body doesn't use insulin properly, and this condition can occur in individuals who do and do not have diabetes. Insulin is a hormone that helps the cells in the body convert glucose (sugar) to energy. Many studies have shown the positive effects of exercise on insulin resistance. In one, 28 obese postmenopausal women with type 2 diabetes did aerobic exercise for 16 weeks, three times per week, for 45-60 minutes, and their insulin sensitivity improved by 20%!
Cardiovascular disease
The list of studies that show that aerobic exercise prevents or reduces the occurrence of cardiovascular disease is so long that it would take this entire article and probably five others just like it to review all of the research. One of the most important is one of the earliest. In a study of more than 13,000 men and women, it was shown that the least fit individuals had much higher rates of cardiovascular disease than fit individuals—in some cases, the risk was twice as high. Aerobic exercise works in many ways to prevent heart disease; two of the most important are by reducing blood pressure and allowing blood vessels to be more compliant (more compliant means that they become less stiff and it's less likely for fat to accumulate and clog up the vessels). Results like these have been proven over and over again.
Obesity and weight control
Aerobic exercise is believed by many scientists to be the single best predictor of weight maintenance. You can lose weight without exercise by reducing your caloric intake enough so that you burn more calories than you consume, but it takes a regular dose of exercise to keep your weight off. How much is not clear, but somewhere between 40 minutes of vigorous exercise several times per week to 75 minutes of moderate intensity exercise five or more days per week is probably about right. Your mileage will vary, and so once you get to the weight that you want to be at you'll need to experiment with different amounts of exercise until you find the one that works for you. The American College of Sports Medicine recommends that overweight and obese individuals progressively increase to a minimum of 150 minutes of moderate intensity physical activity per week, but for long-term weight loss, overweight and obese adults should eventually progress to 200 to 300 minutes per week of moderate-intensity physical activity.
Aerobic exercise definitely burns lots of calories. Below is a table of minutes of continuous activity necessary to expend 300 calories based on your body weight.
Cognitive function
Scientists have recently become interested in the effects of aerobic exercise on cognitive function. It has been shown in rats that use of a running wheel every day stimulates new brain cells to grow in as few as 12 days. Brain cells in humans can't be studied directly, but what has been shown is that rates of dementia and Alzheimer's disease are lower in older individuals who exercise three or more times per week compared with older adults who exercise fewer than three times per week. In some cases the risk is 62% lower! Evidence is also accumulating that active individuals perform better on cognitive function tests such as tests of memory and spatial relations than sedentary individuals. Cognitive function is an exciting area of research in its infancy. I suggest not waiting for more to be known. I say get started now and get those brain cells working!
I defined aerobic exercise for you in the introduction. It's any activity that stimulates your heart rate and breathing to increase but not so much that you can't sustain the activity for more than a few minutes. Aerobic means "with oxygen," and anaerobic means "without oxygen." Anaerobic exercise is the type where you get out of breath in just a few moments, like when you lift weights, when you sprint, or when you climb a long flight of stairs (or a short flight if you're deconditioned!)
A caveat
Dancing, swimming, water aerobics, biking, walking, hiking, and many other activities are all examples of aerobic activities, but they can be anaerobic too if they are performed at a high enough intensity. Try riding your bike alongside Lance Armstrong in the French Alps and you'll know what anaerobic exercise means in moments. But then again, riding along on your bike at a leisurely 8-10 mph on the boardwalk at the seashore is the same activity, but at a much lower intensity, much lower heart rate, and much lower oxygen consumption, and so in this case, biking is aerobic. The bottom line is that the intensity that you perform an activity determines if it's aerobic or anaerobic.
What are the health benefits of aerobic exercise?
Perhaps no area of exercise science has been more studied than the benefits of aerobic exercise. There is a mountain of evidence to prove that regular aerobic exercise will improve your health, your fitness, and much more. Here's a partial list of the documented health benefits of aerobic exercise.
Cancer prevention
Colon cancer. Research is clear that physically active men and women have about a 30%-40% reduction in the risk of developing colon cancer compared with inactive individuals. It appears that 30-60 minutes per day of moderate- to vigorous-intensity physical activity is needed to decrease the risk, and there is a dose-response relationship, which means that the risk declines the more active you are. Breast cancer. There is reasonably clear evidence that physically active women have about a 20%-30% reduction in risk compared with inactive women. Like colon cancer, it appears that 30-60 minutes per day of moderate- to vigorous-intensity physical activity is needed to decrease the risk, and it is likely that there is a dose-response relationship as well. Prostate cancer. Research is inconsistent regarding whether physical activity plays any role in the prevention of this cancer. Lung cancer. There are relatively few studies on physical activity and lung cancer prevention. The available data suggest that physically active individuals have a lower risk of lung cancer; however, it is difficult to completely account for cigarette smoking. Other cancers. There is little information on the role of physical activity in preventing other cancers.
Cancer treatment
There's some good news for people undergoing cancer treatment. In one study, aerobic exercise performed five days per week for 30-35 minutes for six weeks at 80% of maximal heart rate reduced fatigue in women being treated for cancer. In another study, 10 weeks of aerobic exercise at 60% of maximum heart rate for 30-40 minutes, four days per week, reduced depression and anxiety in female cancer patients. Aerobic exercise isn't a panacea when it comes to cancer, but evidence suggests that it certainly can help.
Osteoporosis
Osteoporosis is a disease characterized by low bone density which can lead to an increased risk of fracture. According to the National Osteoporosis Foundation, osteoporosis is responsible for more than 1.5 million fractures annually, including over 300,000 hip fractures, 700,000 vertebral fractures, 250,000 wrist fractures, and 300,000 fractures at other sites. The good news is that exercise may increase bone density or at least slow the rate of decrease in both men and women. It may not work for everyone, and the precise amount and type of exercise necessary to accrue benefits is unknown, but there is evidence that it can help. In children there is good news, too. It seems that active children have greater bone density than sedentary children and that this may help prevent fractures later in life.
Depression
Most of us who exercise regularly understand that exercise can elevate our mood. There have been a number of studies investigating the effects of exercise on depression. In one of the most recent studies, it was shown that three to five days per week for 12 weeks of biking or treadmill for approximately 30 minutes per workout reduced scores on a depression questionnaire by 47%! It's not a substitute for therapy in a depression that causes someone to be unable to function (in which case medication and /or psychotherapy may be necessary), but for milder forms of depression, the evidence is persuasive that it can help.
Diabetes
No study has been more conclusive about the role of lifestyle changes (diet and exercise) in preventing diabetes than the Diabetes Prevention Program. It was a study of more than 3,000 individuals at high risk for diabetes who lost 12-15 pounds and walked 150 minutes per week (five 30-minute walks per day) for three years. They reduced their risk of diabetes by 58%! That's significant considering there are 1 million new cases of diabetes diagnosed each year. Aerobic exercise can also improve insulin resistance. Insulin resistance is a condition where the body doesn't use insulin properly, and this condition can occur in individuals who do and do not have diabetes. Insulin is a hormone that helps the cells in the body convert glucose (sugar) to energy. Many studies have shown the positive effects of exercise on insulin resistance. In one, 28 obese postmenopausal women with type 2 diabetes did aerobic exercise for 16 weeks, three times per week, for 45-60 minutes, and their insulin sensitivity improved by 20%!
Cardiovascular disease
The list of studies that show that aerobic exercise prevents or reduces the occurrence of cardiovascular disease is so long that it would take this entire article and probably five others just like it to review all of the research. One of the most important is one of the earliest. In a study of more than 13,000 men and women, it was shown that the least fit individuals had much higher rates of cardiovascular disease than fit individuals—in some cases, the risk was twice as high. Aerobic exercise works in many ways to prevent heart disease; two of the most important are by reducing blood pressure and allowing blood vessels to be more compliant (more compliant means that they become less stiff and it's less likely for fat to accumulate and clog up the vessels). Results like these have been proven over and over again.
Obesity and weight control
Aerobic exercise is believed by many scientists to be the single best predictor of weight maintenance. You can lose weight without exercise by reducing your caloric intake enough so that you burn more calories than you consume, but it takes a regular dose of exercise to keep your weight off. How much is not clear, but somewhere between 40 minutes of vigorous exercise several times per week to 75 minutes of moderate intensity exercise five or more days per week is probably about right. Your mileage will vary, and so once you get to the weight that you want to be at you'll need to experiment with different amounts of exercise until you find the one that works for you. The American College of Sports Medicine recommends that overweight and obese individuals progressively increase to a minimum of 150 minutes of moderate intensity physical activity per week, but for long-term weight loss, overweight and obese adults should eventually progress to 200 to 300 minutes per week of moderate-intensity physical activity.
Aerobic exercise definitely burns lots of calories. Below is a table of minutes of continuous activity necessary to expend 300 calories based on your body weight.
Cognitive function
Scientists have recently become interested in the effects of aerobic exercise on cognitive function. It has been shown in rats that use of a running wheel every day stimulates new brain cells to grow in as few as 12 days. Brain cells in humans can't be studied directly, but what has been shown is that rates of dementia and Alzheimer's disease are lower in older individuals who exercise three or more times per week compared with older adults who exercise fewer than three times per week. In some cases the risk is 62% lower! Evidence is also accumulating that active individuals perform better on cognitive function tests such as tests of memory and spatial relations than sedentary individuals. Cognitive function is an exciting area of research in its infancy. I suggest not waiting for more to be known. I say get started now and get those brain cells working!
Friday, September 14, 2007
Aerobic Exercise 2
How aerobically fit can we be?
The average sedentary adult will reach a level of oxygen consumption close to 35 ml/kg/min during a maximal treadmill test (where you're asked to walk as hard as you can). Translated, that means the person is consuming 35 milliliters of oxygen for every kilogram of body weight per minute. That'll get you through the day, but elite athletes can reach values as high as 90ml/kg/minute! How do they do it? Good genes for one, but they also train hard. And when they do, their bodies adapt. The good news is that the bodies of mere mortals like the rest of us adapt to training too. Here's how.
What are the fitness benefits of aerobic exercise?
How our bodies adapt
Here's what happens inside your body when you do aerobic exercise regularly:
1. Your heart gets stronger and pumps more blood with each beat (larger stroke volume). Elite athletes, as I just mentioned, can have stroke volumes more than twice as high as average individuals. But it's not just that. Conditioned hearts also have greater diameter and mass (the heart's a muscle too and gets bigger when you train it), and they pump efficiently enough to allow for greater filling time, which is a good thing because it means that more blood fills the chambers of the heart before they pump so that more blood gets pumped with each beat.2. Greater stroke volume means the heart doesn't have to pump as fast to meet the demands of exercise. Fewer beats and more stroke volume mean greater efficiency. Think about a pump emptying water out of a flooded basement. The pump works better and lasts longer if it can pump larger volumes of water with each cycle than if it has to pump faster and strain and to get rid of the water. High stroke volume is why athletes' hearts don't pump as fast during exercise and why they have such low resting heart rates; sometimes as low as 40 beats per minute, whereas the average is 60-80 beats per minutes!3. Downstream from the heart are your muscles, which get more efficient at consuming oxygen when you do regular aerobic exercise. This happens because of an increase in the activity and number of enzymes that transport oxygen into the muscle. Imagine 100 oxygen molecules circulating past a muscle. You're twice as fit if the muscle can consume all 100 molecules than if it can only consume 50. Another way of saying it is that you're twice as fit as someone if your VO2 max is 60ml/kg/min and theirs is 30ml/kg/min. In terms of performance in this scenario, you'll have more endurance because your muscles won't run out of oxygen as quickly.4. Mitochondria inside the muscle increase in number and activity. Mitochondria are the powerhouses of your cells. They do all the heavy-duty work to keep you moving. They use the oxygen to burn the fat and carbohydrate that makes you go. You'd be nowhere without mitochondria! The good news is that they increase in number and activity, by as much as 50%, in just a matter of days to weeks in response to regular aerobic exercise in adults of all ages.
Burn, baby, burn
I mentioned that fat and carbohydrate are the fuels our muscles burn. The difference between them is that fat is high-test; it contains 9 calories per gram whereas carbohydrate has only 4, and so you get more energy and can go farther on a gram of fat than on a gram of carbohydrate. You want to burn fat because it's such an efficient fuel, plus it's nice to lose some of your excess fat! The catch is that you need more oxygen to burn fat because it's denser than carbohydrate. The good news is that your body gets better at using oxygen and burning fat when you do regular aerobic exercise; like I described, your heart pumps more blood, your muscles consume more oxygen, and you have more mitochondria. Regular aerobic exercise has the potential to turn you into a lean, mean, fat-burning machine!
The average sedentary adult will reach a level of oxygen consumption close to 35 ml/kg/min during a maximal treadmill test (where you're asked to walk as hard as you can). Translated, that means the person is consuming 35 milliliters of oxygen for every kilogram of body weight per minute. That'll get you through the day, but elite athletes can reach values as high as 90ml/kg/minute! How do they do it? Good genes for one, but they also train hard. And when they do, their bodies adapt. The good news is that the bodies of mere mortals like the rest of us adapt to training too. Here's how.
What are the fitness benefits of aerobic exercise?
How our bodies adapt
Here's what happens inside your body when you do aerobic exercise regularly:
1. Your heart gets stronger and pumps more blood with each beat (larger stroke volume). Elite athletes, as I just mentioned, can have stroke volumes more than twice as high as average individuals. But it's not just that. Conditioned hearts also have greater diameter and mass (the heart's a muscle too and gets bigger when you train it), and they pump efficiently enough to allow for greater filling time, which is a good thing because it means that more blood fills the chambers of the heart before they pump so that more blood gets pumped with each beat.2. Greater stroke volume means the heart doesn't have to pump as fast to meet the demands of exercise. Fewer beats and more stroke volume mean greater efficiency. Think about a pump emptying water out of a flooded basement. The pump works better and lasts longer if it can pump larger volumes of water with each cycle than if it has to pump faster and strain and to get rid of the water. High stroke volume is why athletes' hearts don't pump as fast during exercise and why they have such low resting heart rates; sometimes as low as 40 beats per minute, whereas the average is 60-80 beats per minutes!3. Downstream from the heart are your muscles, which get more efficient at consuming oxygen when you do regular aerobic exercise. This happens because of an increase in the activity and number of enzymes that transport oxygen into the muscle. Imagine 100 oxygen molecules circulating past a muscle. You're twice as fit if the muscle can consume all 100 molecules than if it can only consume 50. Another way of saying it is that you're twice as fit as someone if your VO2 max is 60ml/kg/min and theirs is 30ml/kg/min. In terms of performance in this scenario, you'll have more endurance because your muscles won't run out of oxygen as quickly.4. Mitochondria inside the muscle increase in number and activity. Mitochondria are the powerhouses of your cells. They do all the heavy-duty work to keep you moving. They use the oxygen to burn the fat and carbohydrate that makes you go. You'd be nowhere without mitochondria! The good news is that they increase in number and activity, by as much as 50%, in just a matter of days to weeks in response to regular aerobic exercise in adults of all ages.
Burn, baby, burn
I mentioned that fat and carbohydrate are the fuels our muscles burn. The difference between them is that fat is high-test; it contains 9 calories per gram whereas carbohydrate has only 4, and so you get more energy and can go farther on a gram of fat than on a gram of carbohydrate. You want to burn fat because it's such an efficient fuel, plus it's nice to lose some of your excess fat! The catch is that you need more oxygen to burn fat because it's denser than carbohydrate. The good news is that your body gets better at using oxygen and burning fat when you do regular aerobic exercise; like I described, your heart pumps more blood, your muscles consume more oxygen, and you have more mitochondria. Regular aerobic exercise has the potential to turn you into a lean, mean, fat-burning machine!
Wednesday, September 5, 2007
Aerobic Exercise
What is aerobic exercise?
Imagine that you're exercising. You're working up a sweat, you're breathing hard, your heart is thumping, blood is coursing through your vessels to deliver oxygen to the muscles to keep you moving, and you sustain the activity for more than just a few minutes. That's aerobic exercise; any activity that you can sustain for more than just a few minutes while your heart, lungs, and muscles work overtime. In this article, I'll discuss the mechanisms of aerobic exercise; oxygen transport and consumption, the role of the heart and the muscles, the proven benefits of aerobic exercise, how much you need to do to reap the benefits, and more.
The beginning
It all starts with breathing. The average healthy adult inhales and exhales about 7 to 8 liters of air per minute. Once you fill your lungs, the oxygen in the air (air contains approximately 20% oxygen) is filtered through small branches of tubes (called bronchioles) until it reaches the alveoli. The alveoli are tiny sacs (they kind of look like bunches of grapes, and you have about 300,000,000 in each lung!) where oxygen diffuses (enters) into the blood. From there, it's a beeline direct to the heart.
Getting to the heart of it
The heart has four chambers that fill with blood and pump blood (two atria and two ventricles) and some very large and active coronary arteries. Because of all this action, the heart needs a fresh supply of oxygen, and as you just learned, the lungs provide it. Once the heart uses what it needs, it pumps the blood, the oxygen, and other nutrients out through the large left ventricle and through the circulatory system to all the organs, muscles, and tissue that need it.
A whole lot of pumping going on
Your heart beats approximately 60-80 times per minute at rest, 100,000 times a day, more than 30 million times per year, and about 2.5 billion times in a 70-year lifetime! Every beat of your heart sends a volume of blood (called stroke volume—more about that later), along with oxygen and many other life-sustaining nutrients, circulating through your body. The average healthy adult heart pumps about 5 liters of blood per minute.
Oxygen consumption and muscles
All that oxygen being pumped by the blood is important. You may be familiar with the term "oxygen consumption." In science, it's labeled VO2, or volume of oxygen consumed. It's the amount of oxygen the muscles extract, or consume from the blood, and it's expressed as ml/kg/minute (milliliters per kilogram of body weight). Muscles are like engines that run on fuel (just like an automobile that runs on fuel); only our muscles use fat and carbohydrates instead of gasoline. Oxygen is a key player because, once inside the muscle, it's used to burn fat and carbohydrate for fuel to keep our engines running. The more efficient our muscles are at consuming oxygen, the more fuel we can burn, the more fit we are, and the longer we can exercise.
How aerobically fit can we be?
The average sedentary adult will reach a level of oxygen consumption close to 35 ml/kg/min during a maximal treadmill test (where you're asked to walk as hard as you can). Translated, that means the person is consuming 35 milliliters of oxygen for every kilogram of body weight per minute. That'll get you through the day, but elite athletes can reach values as high as 90ml/kg/minute! How do they do it? Good genes for one, but they also train hard. And when they do, their bodies adapt. The good news is that the bodies of mere mortals like the rest of us adapt to training too. Here's how.
Imagine that you're exercising. You're working up a sweat, you're breathing hard, your heart is thumping, blood is coursing through your vessels to deliver oxygen to the muscles to keep you moving, and you sustain the activity for more than just a few minutes. That's aerobic exercise; any activity that you can sustain for more than just a few minutes while your heart, lungs, and muscles work overtime. In this article, I'll discuss the mechanisms of aerobic exercise; oxygen transport and consumption, the role of the heart and the muscles, the proven benefits of aerobic exercise, how much you need to do to reap the benefits, and more.
The beginning
It all starts with breathing. The average healthy adult inhales and exhales about 7 to 8 liters of air per minute. Once you fill your lungs, the oxygen in the air (air contains approximately 20% oxygen) is filtered through small branches of tubes (called bronchioles) until it reaches the alveoli. The alveoli are tiny sacs (they kind of look like bunches of grapes, and you have about 300,000,000 in each lung!) where oxygen diffuses (enters) into the blood. From there, it's a beeline direct to the heart.
Getting to the heart of it
The heart has four chambers that fill with blood and pump blood (two atria and two ventricles) and some very large and active coronary arteries. Because of all this action, the heart needs a fresh supply of oxygen, and as you just learned, the lungs provide it. Once the heart uses what it needs, it pumps the blood, the oxygen, and other nutrients out through the large left ventricle and through the circulatory system to all the organs, muscles, and tissue that need it.
A whole lot of pumping going on
Your heart beats approximately 60-80 times per minute at rest, 100,000 times a day, more than 30 million times per year, and about 2.5 billion times in a 70-year lifetime! Every beat of your heart sends a volume of blood (called stroke volume—more about that later), along with oxygen and many other life-sustaining nutrients, circulating through your body. The average healthy adult heart pumps about 5 liters of blood per minute.
Oxygen consumption and muscles
All that oxygen being pumped by the blood is important. You may be familiar with the term "oxygen consumption." In science, it's labeled VO2, or volume of oxygen consumed. It's the amount of oxygen the muscles extract, or consume from the blood, and it's expressed as ml/kg/minute (milliliters per kilogram of body weight). Muscles are like engines that run on fuel (just like an automobile that runs on fuel); only our muscles use fat and carbohydrates instead of gasoline. Oxygen is a key player because, once inside the muscle, it's used to burn fat and carbohydrate for fuel to keep our engines running. The more efficient our muscles are at consuming oxygen, the more fuel we can burn, the more fit we are, and the longer we can exercise.
How aerobically fit can we be?
The average sedentary adult will reach a level of oxygen consumption close to 35 ml/kg/min during a maximal treadmill test (where you're asked to walk as hard as you can). Translated, that means the person is consuming 35 milliliters of oxygen for every kilogram of body weight per minute. That'll get you through the day, but elite athletes can reach values as high as 90ml/kg/minute! How do they do it? Good genes for one, but they also train hard. And when they do, their bodies adapt. The good news is that the bodies of mere mortals like the rest of us adapt to training too. Here's how.
Monday, August 27, 2007
For Better Fitness, Swim Like a Fish
Swimming is easy on the body, and a great way to get fit. Aquatics are cardiovascular and strengthening all in one -- and a great hot-weather exercise. What kid doesn't love swimming?
Water exercise is one of the best nonimpact fitness activities around, says the American Council on Exercise. Just about anybody can swim or work out in water, including pregnant women, the elderly, the overweight, and people with arthritis or physical disabilities.
What's great about swimming? The buoyancy of water reduces your weight by about 90%. That puts less stress on joints, bones, and muscles. That's why a pool is a great place for people with arthritis or back problems to exercise.
When you swim, you involve all the major muscle groups -- the shoulders, back, abdominals, legs, hips, and glutes. Because water provides 12 times the resistance, exercise in water helps build strength. Water exercise strengthens your heart, as well.
Do it right, and swimming can also help you lose weight. But you have to push yourself because it's harder to lose weight by swimming than, say, by running. To get the burn, push hard for short spurts, then drop back to a less-intense level. It's interval training, just like you would do with walking.
Getting Started on Water Fitness
Check with your local YMCA or a health club for a swim class. A "master's" swimming group is one that's for people over age 20 -- so don't be intimidated by the name.
Get comfortable putting your face in the water. Practice swimming drills with a kickboard. Then start learning the right swimming techniques. Getting the rhythm of the swim strokes and the breathing can be tricky at first. But coaches break it down and help you get there slowly.
If you're just beginning to swim, start slowly. Try to swim for 10 minutes. Build up to a 30-minute water workout, three to five times a week.
The pool is a great place to get a good workout -- and to feel like a kid again. Don't be afraid to take the plunge!
Water exercise is one of the best nonimpact fitness activities around, says the American Council on Exercise. Just about anybody can swim or work out in water, including pregnant women, the elderly, the overweight, and people with arthritis or physical disabilities.
What's great about swimming? The buoyancy of water reduces your weight by about 90%. That puts less stress on joints, bones, and muscles. That's why a pool is a great place for people with arthritis or back problems to exercise.
When you swim, you involve all the major muscle groups -- the shoulders, back, abdominals, legs, hips, and glutes. Because water provides 12 times the resistance, exercise in water helps build strength. Water exercise strengthens your heart, as well.
Do it right, and swimming can also help you lose weight. But you have to push yourself because it's harder to lose weight by swimming than, say, by running. To get the burn, push hard for short spurts, then drop back to a less-intense level. It's interval training, just like you would do with walking.
Getting Started on Water Fitness
Check with your local YMCA or a health club for a swim class. A "master's" swimming group is one that's for people over age 20 -- so don't be intimidated by the name.
Get comfortable putting your face in the water. Practice swimming drills with a kickboard. Then start learning the right swimming techniques. Getting the rhythm of the swim strokes and the breathing can be tricky at first. But coaches break it down and help you get there slowly.
If you're just beginning to swim, start slowly. Try to swim for 10 minutes. Build up to a 30-minute water workout, three to five times a week.
The pool is a great place to get a good workout -- and to feel like a kid again. Don't be afraid to take the plunge!
Saturday, August 25, 2007
7 Most Effective Exercises
Experts say there is no magic to exercise You get out of it what you put in. That doesn't mean you have to work out for hours each day. It just means you need to work smart. That said, experts agree that not all exercises are created equal. Some are simply more efficient than others, whether they target multiple muscle groups, are suitable for a wide variety of fitness levels, or help you burn calories more effectively.
So what are the best exercises? We posed this question to four fitness experts and compiled a list of their favorites.
1. Walking:
Any exercise program should include cardiovascular exercise, which strengthens the heart and burns calories. And walking is something you can do anywhere, anytime, with no equipment other than a good pair of shoes. It's not just for beginners, either: Even the very fit can get a good workout from walking. "Doing a brisk walk can burn up to 500 calories per hour," says Robert Gotlin, DO, director of orthopaedic and sports rehabilitation at Beth Israel Medical Center in New York. Since it takes 3,500 calories to lose a pound, you could expect to lose a pound for every seven hours you walk, if you did nothing else. Don't go from the sofa to walking an hour day, though. Richard Cotton, a spokesman for the American Council on Exercise, says beginners should start by walking five to -10 minutes at a time, gradually moving up to at least 30 minutes per session. "Don't add more than five minutes at a time," he says. Another tip: It's better to lengthen your walks before boosting your speed or incline.
2. Interval training:
Whether you're a beginner or an exercise veteran, a walker or an aerobic dancer, adding interval training to your cardiovascular workout will boost your fitness level and help you lose weight. "Varying your pace throughout the exercise session stimulates the aerobic system to adapt," says Cotton. "The more power the aerobic system has, the more capacity you have to burn calories." The way to do it is to push the intensity or pace for a minute or two, then back off for anywhere from two to -10 minutes (depending on how long your total workout will be, and how much time you need to recover). Continue doing this throughout the workout.
3. Squats:
Strength training is essential, the experts say. "The more muscular fitness you have," says Cotton, "the greater the capacity you have to burn calories." And our experts tended to favor strength-training exercises that target multiple muscle groups. Squats, which work the quadriceps, hamstrings, and gluteals, are an excellent example. "They give you the best bang for the buck because they use the most muscle groups at once," says Oldsmar, Fla., trainer David Petersen. Form is key, though, warns Petersen. "What makes an exercise functional is how you perform the exercise," he says. "If you have bad technique, it's no longer functional." For perfect form, keep feet shoulder-width apart and back straight. Bend knees and lower your rear, says Cotton: "The knee should remain over the ankle as much as possible." "Think of how you sit down in a chair, only the chair's not there," suggests Gotlin. Physical therapist Adam Rufa, of Cicero, N.Y., says practicing with a real chair can help. "Start by working on getting in and out of a real chair properly," he says. Once you've mastered that, try just tapping the chair with your bottom, then coming back up. Then do the same motion without the chair. Gotlin sees lots of patients with knee pain, and says quadriceps weakness is the cause much of the time. If you feel pain going down stairs, he says, strengthening your quads with squats may very well help.
4. Lunges:
Like squats, lunges work all the major muscles of the lower body: gluteals, quadriceps, and hamstrings. "A lunge is a great exercise because it mimics life, it mimics walking," only exaggerated, says Petersen. Lunges are a bit more advanced than squats, says Cotton, helping to improve your balance as well. Here's how to do them right: Take a big step forward, keeping your spine in a neutral position. Bend your front knee to approximately 90 degrees, focusing on keeping weight on the back toes and dropping the knee of your back leg toward the floor. Petersen suggests that you imagine sitting on your back foot. "The trailing leg is the one you need to sit down on," he says. To make a lunge even more functional, says Rufa, try stepping not just forward, but back and out to each side. "Life is not linear, it's multiplanar," says Rufa. And the better they prepare you for the various positions you'll move in during the course of a day, the more useful exercises are.
5. Push-ups:
If done correctly, the push-up can strengthen the chest, shoulders, triceps, and even the core trunk muscles, all at one time. "I'm very much into planking exercises, almost yoga-type moves," says Petersen. "Anytime you have the pelvis and the core [abdominals and back] in a suspended position, you have to rely on your own adherent strength to stabilize you." Push-ups can be done at any level of fitness, says Cotton: "For someone who is at a more beginning level, start by pushing from the kitchen-counter height. Then work your way to a desk, a chair, the floor with bent knees, and, finally, the floor on your toes." Here's how to do a perfect push-up: From a face-down position, place your hands slightly wider than shoulder-width apart. Place your toes or knees on the floor, and try to create a perfect diagonal with your body, from the shoulders to the knees or feet. Keep the glutes [rear-end muscles] and abdominals engaged. Then lower and lift your body by bending and straightening your elbows, keeping your torso stable throughout. There are always ways to make it harder, says Rufa. Once your form is perfect, try what he calls the "T-stabilization" push-up: Get into push-up position, then do your push-ups with one arm raised out to the side, balancing on the remaining three limbs without rotating your hips.
6. Abdominal Crunches:
Who doesn't want firm, flat abs? Experts say that when done correctly, the familiar crunch (along with its variations) is a good choice to target them. For a standard crunch, says Cotton, begin lying on your back with feet flat on the floor and fingertips supporting your head. Press your low back down and begin the exercise by contracting abdominals and peeling first your head (tucking your chin slightly), then your neck, shoulders, and upper back off the floor. Be careful not to pull your neck forward of the rest of your spine by sticking the chin out; don't hold your breath, and keep elbows out of your line of vision to keep chest and shoulders open. For his part, Petersen teaches his clients to do crunches with their feet off the floor and knees bent. He says that with feet kept on the floor, many people tend to arch the back and engage the hip flexors. "Crunches can be excellent, but if they're not done correctly, with the back arching, they can actually weaken the abdominals," Petersen says. To work the obliques (the muscles on the sides of your waist), says Cotton, take the standard crunch and rotate the spine toward one side as you curl off the floor. "Twist before you come up," he says. "It's really important that the twist comes first because then it's the obliques that are actually getting you up." But keep in mind that you won't get a flat stomach with crunches alone, says Cotton. Burning belly fat requires the well-known formula: using up more calories than you take in. "Crunches work the ab muscles; [they're] not to be mistaken as exercise that burns the fat over the abdominals," he says. "That's the biggest myth in exercise going."
7. Bent-over Row:
Talk about bang for the buck: This exercise works all the major muscles of the upper back, as well as the biceps. Here's how to do it with good form. Stand with feet shoulder-width apart, then bend knees and flex forward at the hips. (If you have trouble doing this exercise standing up, support your weight by sitting on an incline bench, facing backward.) Tilt your pelvis slightly forward, engage the abdominals, and extend your upper spine to add support. Hold dumbbells or barbell beneath the shoulders with hands about shoulder-width apart. Flex your elbows, and lift both hands toward the sides of your body. Pause, then slowly lower hands to the starting position. (Beginners should perform the move without weights.) Technique.
These seven exercises are excellent, efficient choices, the experts say. But with just about any strength or resistance exercise, says Petersen, the question is not so much whether the exercise works as how well you execute.
"Done with good technique, all exercises do what they're supposed to do," says Petersen.
The trouble is that poor form can change the whole exercise, putting emphasis or even strain on different areas than intended. This can hurt, rather than help you.
So especially if you're a beginner, it's a good idea to seek the advice of a fitness trainer - whether it's a personal trainer or a trainer at your gym -- to be sure your form is safe and correct.
So what are the best exercises? We posed this question to four fitness experts and compiled a list of their favorites.
1. Walking:
Any exercise program should include cardiovascular exercise, which strengthens the heart and burns calories. And walking is something you can do anywhere, anytime, with no equipment other than a good pair of shoes. It's not just for beginners, either: Even the very fit can get a good workout from walking. "Doing a brisk walk can burn up to 500 calories per hour," says Robert Gotlin, DO, director of orthopaedic and sports rehabilitation at Beth Israel Medical Center in New York. Since it takes 3,500 calories to lose a pound, you could expect to lose a pound for every seven hours you walk, if you did nothing else. Don't go from the sofa to walking an hour day, though. Richard Cotton, a spokesman for the American Council on Exercise, says beginners should start by walking five to -10 minutes at a time, gradually moving up to at least 30 minutes per session. "Don't add more than five minutes at a time," he says. Another tip: It's better to lengthen your walks before boosting your speed or incline.
2. Interval training:
Whether you're a beginner or an exercise veteran, a walker or an aerobic dancer, adding interval training to your cardiovascular workout will boost your fitness level and help you lose weight. "Varying your pace throughout the exercise session stimulates the aerobic system to adapt," says Cotton. "The more power the aerobic system has, the more capacity you have to burn calories." The way to do it is to push the intensity or pace for a minute or two, then back off for anywhere from two to -10 minutes (depending on how long your total workout will be, and how much time you need to recover). Continue doing this throughout the workout.
3. Squats:
Strength training is essential, the experts say. "The more muscular fitness you have," says Cotton, "the greater the capacity you have to burn calories." And our experts tended to favor strength-training exercises that target multiple muscle groups. Squats, which work the quadriceps, hamstrings, and gluteals, are an excellent example. "They give you the best bang for the buck because they use the most muscle groups at once," says Oldsmar, Fla., trainer David Petersen. Form is key, though, warns Petersen. "What makes an exercise functional is how you perform the exercise," he says. "If you have bad technique, it's no longer functional." For perfect form, keep feet shoulder-width apart and back straight. Bend knees and lower your rear, says Cotton: "The knee should remain over the ankle as much as possible." "Think of how you sit down in a chair, only the chair's not there," suggests Gotlin. Physical therapist Adam Rufa, of Cicero, N.Y., says practicing with a real chair can help. "Start by working on getting in and out of a real chair properly," he says. Once you've mastered that, try just tapping the chair with your bottom, then coming back up. Then do the same motion without the chair. Gotlin sees lots of patients with knee pain, and says quadriceps weakness is the cause much of the time. If you feel pain going down stairs, he says, strengthening your quads with squats may very well help.
4. Lunges:
Like squats, lunges work all the major muscles of the lower body: gluteals, quadriceps, and hamstrings. "A lunge is a great exercise because it mimics life, it mimics walking," only exaggerated, says Petersen. Lunges are a bit more advanced than squats, says Cotton, helping to improve your balance as well. Here's how to do them right: Take a big step forward, keeping your spine in a neutral position. Bend your front knee to approximately 90 degrees, focusing on keeping weight on the back toes and dropping the knee of your back leg toward the floor. Petersen suggests that you imagine sitting on your back foot. "The trailing leg is the one you need to sit down on," he says. To make a lunge even more functional, says Rufa, try stepping not just forward, but back and out to each side. "Life is not linear, it's multiplanar," says Rufa. And the better they prepare you for the various positions you'll move in during the course of a day, the more useful exercises are.
5. Push-ups:
If done correctly, the push-up can strengthen the chest, shoulders, triceps, and even the core trunk muscles, all at one time. "I'm very much into planking exercises, almost yoga-type moves," says Petersen. "Anytime you have the pelvis and the core [abdominals and back] in a suspended position, you have to rely on your own adherent strength to stabilize you." Push-ups can be done at any level of fitness, says Cotton: "For someone who is at a more beginning level, start by pushing from the kitchen-counter height. Then work your way to a desk, a chair, the floor with bent knees, and, finally, the floor on your toes." Here's how to do a perfect push-up: From a face-down position, place your hands slightly wider than shoulder-width apart. Place your toes or knees on the floor, and try to create a perfect diagonal with your body, from the shoulders to the knees or feet. Keep the glutes [rear-end muscles] and abdominals engaged. Then lower and lift your body by bending and straightening your elbows, keeping your torso stable throughout. There are always ways to make it harder, says Rufa. Once your form is perfect, try what he calls the "T-stabilization" push-up: Get into push-up position, then do your push-ups with one arm raised out to the side, balancing on the remaining three limbs without rotating your hips.
6. Abdominal Crunches:
Who doesn't want firm, flat abs? Experts say that when done correctly, the familiar crunch (along with its variations) is a good choice to target them. For a standard crunch, says Cotton, begin lying on your back with feet flat on the floor and fingertips supporting your head. Press your low back down and begin the exercise by contracting abdominals and peeling first your head (tucking your chin slightly), then your neck, shoulders, and upper back off the floor. Be careful not to pull your neck forward of the rest of your spine by sticking the chin out; don't hold your breath, and keep elbows out of your line of vision to keep chest and shoulders open. For his part, Petersen teaches his clients to do crunches with their feet off the floor and knees bent. He says that with feet kept on the floor, many people tend to arch the back and engage the hip flexors. "Crunches can be excellent, but if they're not done correctly, with the back arching, they can actually weaken the abdominals," Petersen says. To work the obliques (the muscles on the sides of your waist), says Cotton, take the standard crunch and rotate the spine toward one side as you curl off the floor. "Twist before you come up," he says. "It's really important that the twist comes first because then it's the obliques that are actually getting you up." But keep in mind that you won't get a flat stomach with crunches alone, says Cotton. Burning belly fat requires the well-known formula: using up more calories than you take in. "Crunches work the ab muscles; [they're] not to be mistaken as exercise that burns the fat over the abdominals," he says. "That's the biggest myth in exercise going."
7. Bent-over Row:
Talk about bang for the buck: This exercise works all the major muscles of the upper back, as well as the biceps. Here's how to do it with good form. Stand with feet shoulder-width apart, then bend knees and flex forward at the hips. (If you have trouble doing this exercise standing up, support your weight by sitting on an incline bench, facing backward.) Tilt your pelvis slightly forward, engage the abdominals, and extend your upper spine to add support. Hold dumbbells or barbell beneath the shoulders with hands about shoulder-width apart. Flex your elbows, and lift both hands toward the sides of your body. Pause, then slowly lower hands to the starting position. (Beginners should perform the move without weights.) Technique.
These seven exercises are excellent, efficient choices, the experts say. But with just about any strength or resistance exercise, says Petersen, the question is not so much whether the exercise works as how well you execute.
"Done with good technique, all exercises do what they're supposed to do," says Petersen.
The trouble is that poor form can change the whole exercise, putting emphasis or even strain on different areas than intended. This can hurt, rather than help you.
So especially if you're a beginner, it's a good idea to seek the advice of a fitness trainer - whether it's a personal trainer or a trainer at your gym -- to be sure your form is safe and correct.
Thursday, August 23, 2007
Workout Routines and New Ideas for Fitness
Fitness isn't just a plan you embark on, along with a diet, to lose weight. It's a lifelong love of movement that will help you maintain good health and the physique you want. We?ve compiled some workout routines and ideas to help you along your way.
These recommendations will help you evolve your workout routine and activity plan. The theme is picking something you love doing, and nurturing your feelings every step of the way.
After you read through these workout options, consider journaling to explore your fitness habits, desires, and goals.
Level One:
Begin by expanding your definition of exercise: You don't need to run, sweat, or grunt -- any opportunity to partake in activity counts as exercise!
If you feel uncomfortable going to a gym, a 10-minute walk, twice weekly, is an excellent first step toward better fitness. If you enjoy and can afford it, get a regular massage as well. Consider buying a good beginner's exercise tape, too. (A tip: rent exercise videos from your local library and try them out to see which you enjoy.) Another great activity is gardening, an underrated form of stress reduction and exercise.
Get in touch with your physicality by using a Jacuzzi or sauna after a cool shower, or just by taking a bubble bath. Afterward, try some gentle stretching, perhaps followed by another cool-down shower and Jacuzzi. A facial is another good way to reconnect your physical and mental being.
If you feel daring, consider karate, a dance class, or bowling. Enjoy the activities you pick, but don't make yourself continue with them any longer than you want to; for instance, don't force yourself to bowl three games if you feel like bowling only one. Remember that your goal is to make yourself healthier and fitter by nurturing yourself and reducing stress.
Level Two:
Think about bowling, softball, or any other type of entry-level team activity. Many people who aren't natural-born athletes love team sports because of the combination of exercise and social interaction. (Mall-walking groups offer the same benefit if you're looking for something less strenuous.)
If group activities aren't for you, start a walking routine, two or three times a week, for 15 to 20 minutes. If you feel like it, jog for a few minutes during each walk. Do a few jumping jacks, sit-ups, or push-ups -- along with stretches -- in the morning before work. Jump rope with your kids or buy yourself a Hula Hoop. Take an in-line skating class, or start going out dancing occasionally with friends.
Dance, tai chi, and yoga classes are enjoyable, low-stress fitness activities. Also, consider buying several exercise tapes and try out fun activities including biking, swimming, horseback riding, or even a regular game of Frisbee with your dog.
Focus, above all, on giving yourself permission to enjoy your physicality. If you can, start getting regular massages. If you belong to a gym, don't feel you must do a strenuous workout every time you're there. Try going occasionally just for the enjoyment of stretching for several minutes and then taking a Jacuzzi, steam, or sauna bath. You'll learn to reconnect with your physicality and rediscover your body as a source of pleasure.
Level Three:
By choosing the right exercise program, you can make your natural athleticism work for you. Avoid heavy-duty exercise programs that trim off inches for a little while but may not work in the long run because they can cause burnout.
For long-term results, find activities that you enjoy, instead of merely choosing those that burn calories. You probably already know some of the activities you do and don't like, so select those you prefer and drop the ones that bore or stress you.
For instance, are you starting to dread your usual five-mile run? If so, give yourself permission to take a leisurely bike ride or swim. Too tired for a 30-minute workout? Exercise for 15 minutes, and see if you feel like continuing. And if you find yourself setting harder and harder goals ("I need to run an eight-minute mile"), reconsider your priorities. Remember that getting regular, moderate exercise is smarter and more effective than forcing yourself to do grueling workouts that can lead to injury or burnout.
You might enjoy the challenge of participating in a run or bike race for charity -- a great way to get exercise while meeting new people and helping your community. You might even want to train for a half-marathon, if running is your favorite activity. Just be sure to make fun and stress reduction -- not calorie-burning -- your top priorities!
Level Four:
Keep up the good work! Your goal is to establish a healthy, pleasant exercise routine, intermingling challenging activities with peaceful and relaxing mind/body experiences. If you find yourself getting bored, vary your exercise routine with creative new activities. For instance, if you're tired of jogging every morning, try taking up kickboxing, spin cycling, in-line skating, even a jazz dance class. Spicing up your exercise routine will motivate you to stick with it.
No matter what level of activity is right for you, concentrate on nurturing yourself through exercise. When you do, you'll feel good -- and when you feel good, you'll stick with your fitness plan.
Some days, that plan might lead you to be the first person at the gym or to sign up for a challenging fitness run. Other days, you'll be found at the spa, getting a massage or stretching for a few minutes before you take a leisurely walk. It may seem hard to believe, but all of these activities are active ways of achieving true and lasting fitness.
So forget "no pain, no gain," and focus on the joy of swimming, walking, skating, belly dancing, or even Jacuzzi-ing your way to better health and a trimmer body. Expand your definition of exercise to include any activities that help you relieve stress and "connect" your mind and body -- and make a commitment, based on self-love and self-affirmation, to make exercise a priority in your life. When you do, you'll see your excess pounds and inches come off more quickly and effortlessly.
Most of all, remember that combining a variety of workout routines and ideas can help keep your exercise program interesting so that you?ll be more likely to stay on the road to lifelong better health and fitness.
These recommendations will help you evolve your workout routine and activity plan. The theme is picking something you love doing, and nurturing your feelings every step of the way.
After you read through these workout options, consider journaling to explore your fitness habits, desires, and goals.
Level One:
Begin by expanding your definition of exercise: You don't need to run, sweat, or grunt -- any opportunity to partake in activity counts as exercise!
If you feel uncomfortable going to a gym, a 10-minute walk, twice weekly, is an excellent first step toward better fitness. If you enjoy and can afford it, get a regular massage as well. Consider buying a good beginner's exercise tape, too. (A tip: rent exercise videos from your local library and try them out to see which you enjoy.) Another great activity is gardening, an underrated form of stress reduction and exercise.
Get in touch with your physicality by using a Jacuzzi or sauna after a cool shower, or just by taking a bubble bath. Afterward, try some gentle stretching, perhaps followed by another cool-down shower and Jacuzzi. A facial is another good way to reconnect your physical and mental being.
If you feel daring, consider karate, a dance class, or bowling. Enjoy the activities you pick, but don't make yourself continue with them any longer than you want to; for instance, don't force yourself to bowl three games if you feel like bowling only one. Remember that your goal is to make yourself healthier and fitter by nurturing yourself and reducing stress.
Level Two:
Think about bowling, softball, or any other type of entry-level team activity. Many people who aren't natural-born athletes love team sports because of the combination of exercise and social interaction. (Mall-walking groups offer the same benefit if you're looking for something less strenuous.)
If group activities aren't for you, start a walking routine, two or three times a week, for 15 to 20 minutes. If you feel like it, jog for a few minutes during each walk. Do a few jumping jacks, sit-ups, or push-ups -- along with stretches -- in the morning before work. Jump rope with your kids or buy yourself a Hula Hoop. Take an in-line skating class, or start going out dancing occasionally with friends.
Dance, tai chi, and yoga classes are enjoyable, low-stress fitness activities. Also, consider buying several exercise tapes and try out fun activities including biking, swimming, horseback riding, or even a regular game of Frisbee with your dog.
Focus, above all, on giving yourself permission to enjoy your physicality. If you can, start getting regular massages. If you belong to a gym, don't feel you must do a strenuous workout every time you're there. Try going occasionally just for the enjoyment of stretching for several minutes and then taking a Jacuzzi, steam, or sauna bath. You'll learn to reconnect with your physicality and rediscover your body as a source of pleasure.
Level Three:
By choosing the right exercise program, you can make your natural athleticism work for you. Avoid heavy-duty exercise programs that trim off inches for a little while but may not work in the long run because they can cause burnout.
For long-term results, find activities that you enjoy, instead of merely choosing those that burn calories. You probably already know some of the activities you do and don't like, so select those you prefer and drop the ones that bore or stress you.
For instance, are you starting to dread your usual five-mile run? If so, give yourself permission to take a leisurely bike ride or swim. Too tired for a 30-minute workout? Exercise for 15 minutes, and see if you feel like continuing. And if you find yourself setting harder and harder goals ("I need to run an eight-minute mile"), reconsider your priorities. Remember that getting regular, moderate exercise is smarter and more effective than forcing yourself to do grueling workouts that can lead to injury or burnout.
You might enjoy the challenge of participating in a run or bike race for charity -- a great way to get exercise while meeting new people and helping your community. You might even want to train for a half-marathon, if running is your favorite activity. Just be sure to make fun and stress reduction -- not calorie-burning -- your top priorities!
Level Four:
Keep up the good work! Your goal is to establish a healthy, pleasant exercise routine, intermingling challenging activities with peaceful and relaxing mind/body experiences. If you find yourself getting bored, vary your exercise routine with creative new activities. For instance, if you're tired of jogging every morning, try taking up kickboxing, spin cycling, in-line skating, even a jazz dance class. Spicing up your exercise routine will motivate you to stick with it.
No matter what level of activity is right for you, concentrate on nurturing yourself through exercise. When you do, you'll feel good -- and when you feel good, you'll stick with your fitness plan.
Some days, that plan might lead you to be the first person at the gym or to sign up for a challenging fitness run. Other days, you'll be found at the spa, getting a massage or stretching for a few minutes before you take a leisurely walk. It may seem hard to believe, but all of these activities are active ways of achieving true and lasting fitness.
So forget "no pain, no gain," and focus on the joy of swimming, walking, skating, belly dancing, or even Jacuzzi-ing your way to better health and a trimmer body. Expand your definition of exercise to include any activities that help you relieve stress and "connect" your mind and body -- and make a commitment, based on self-love and self-affirmation, to make exercise a priority in your life. When you do, you'll see your excess pounds and inches come off more quickly and effortlessly.
Most of all, remember that combining a variety of workout routines and ideas can help keep your exercise program interesting so that you?ll be more likely to stay on the road to lifelong better health and fitness.
Thursday, August 16, 2007
Benefits of Exercise 2
7. Psychological Benefits : Improved self-esteem is one of the top benefits of regular physical activity. While exercising, your body releases chemicals called endorphins that can improve your mood and the way you feel about yourself. The feeling that follows a run or workout is often described as "euphoric" and is accompanied by an energizing outlook. Exercise can help you cope with stress and ward off depression and anxiety.
And these are just a few of the ways exercise improves your health. Studies have suggested it can also help with certain types of cancer, improve immune function, and more.
Putting It All Together: Exercise and a Healthy Diet
Exercise alone produces modest weight loss; when combined with a reduced-calorie diet, the effects are much more impressive.
In a study published in The Journal of the American Medical Association, University of Pittsburgh researchers found that people who exercised regularly and ate a healthy, modest-calorie diet lost weight and improved cardiorespiratory fitness regardless of the length or intensity of their workouts.
Another study published in JAMA showed that it is never too late to reap the benefits of physical activity. Sedentary women 65 years and older who began walking a mile a day cut their rates of death from all causes by 50%.
Resistance, Resistance
If exercise is so good for us, why aren't people doing it?
Some 64% of men and 72% of women fail to fit in activity on a daily basis, according to data from the 2000 National Health Interview Survey. Americans today are no more active than they were a decade ago.
The American College of Sports Medicine recommends a combination of aerobic exercise (the type that makes you breathe harder, like walking or jogging) for cardiovascular conditioning; strength training (like lifting weights or calisthenics) for muscle toning, and stretching to improve your range of motion.
Strive for doing all three types, but remember that any exercise is better than nothing. Here are
some easy ways to work physical activity into your life:
Adopt a dog and take it for walks every day.
Do things the old-fashioned way -- get up and change the television channel; open the garage door manually; use a push lawnmower.
Take the stairs instead of the elevator.
Walk briskly whenever you can.
Minimize use of your car; walk to destinations within a mile.
Take up tennis or any other game or sport you enjoy.
Join a gym or health club.
Next time you are tempted to skip exercising, keep these wonderful health benefits in mind and remember, every little bit helps. You may not feel up to a rigorous workout, but how about a walk in the neighborhood?
Don't pass up a chance of a lifetime -- that is, a longer and healthier one.
And these are just a few of the ways exercise improves your health. Studies have suggested it can also help with certain types of cancer, improve immune function, and more.
Putting It All Together: Exercise and a Healthy Diet
Exercise alone produces modest weight loss; when combined with a reduced-calorie diet, the effects are much more impressive.
In a study published in The Journal of the American Medical Association, University of Pittsburgh researchers found that people who exercised regularly and ate a healthy, modest-calorie diet lost weight and improved cardiorespiratory fitness regardless of the length or intensity of their workouts.
Another study published in JAMA showed that it is never too late to reap the benefits of physical activity. Sedentary women 65 years and older who began walking a mile a day cut their rates of death from all causes by 50%.
Resistance, Resistance
If exercise is so good for us, why aren't people doing it?
Some 64% of men and 72% of women fail to fit in activity on a daily basis, according to data from the 2000 National Health Interview Survey. Americans today are no more active than they were a decade ago.
The American College of Sports Medicine recommends a combination of aerobic exercise (the type that makes you breathe harder, like walking or jogging) for cardiovascular conditioning; strength training (like lifting weights or calisthenics) for muscle toning, and stretching to improve your range of motion.
Strive for doing all three types, but remember that any exercise is better than nothing. Here are
some easy ways to work physical activity into your life:
Adopt a dog and take it for walks every day.
Do things the old-fashioned way -- get up and change the television channel; open the garage door manually; use a push lawnmower.
Take the stairs instead of the elevator.
Walk briskly whenever you can.
Minimize use of your car; walk to destinations within a mile.
Take up tennis or any other game or sport you enjoy.
Join a gym or health club.
Next time you are tempted to skip exercising, keep these wonderful health benefits in mind and remember, every little bit helps. You may not feel up to a rigorous workout, but how about a walk in the neighborhood?
Don't pass up a chance of a lifetime -- that is, a longer and healthier one.
Benefits of Exercise 1
1. Heart Disease : Regular activity strengthens your heart muscle; lowers blood pressure; increases "good" cholesterol (high-density lipoproteins or HDLs) and lowers "bad" cholesterol (low-density lipoproteins or LDLs); enhances blood flow; and helps your heart function more efficiently. All of these benefits reduce the risk of stroke, heart disease, and high blood pressure.
Researchers at Duke University suggest that the amount of physical activity, rather than its intensity, has the biggest impact on improving blood lipids (cholesterol). According to The New England Journal of Medicine, these researchers also found that any exercise is better than none -- although more is better.
2. Stroke : In an analysis of 23 studies, researchers found that being active reduces your risk of having and dying from a stroke. According to a study published in the journal Stroke, moderately active study participants had 20% less risk of stroke than less active participants.
3. Type II Diabetes : This disease is increasing at alarming rates -- by 62% since 1990 -- and 17 million Americans now have it. Physical activity can enhance weight loss and help prevent and/or control this condition. Losing weight can increase insulin sensitivity, improve blood sugar and cholesterol levels, and reduce blood pressure -- all of which are very important to the health of people with diabetes.
In a study published in the Annals of Internal Medicine, Frank Hu, MD, of the Harvard School of Public Health found that a brisk walk for one hour daily could reduce the risk of type II diabetes by 34%.
4. Obesity : Overweight and obese conditions can be prevented or treated with exercise along with a healthy diet. Activity helps to reduce body fat and increase muscle mass, thus improving your body's ability to burn calories. The combination of reduced calories and daily exercise is the ticket to weight loss. And controlling obesity is critical, as it is a major risk factor for many diseases. Lowering your body mass index (BMI) is a sure way to reduce your risk of dying early and to live a healthier life.
5. Back Pain : Back pain can be managed or prevented with a fitness program that includes muscle strengthening and flexibility. Having good posture and a strong abdomen is the body's best defense against back pain.
6. Osteoporosis : Weight-bearing exercise (such as walking, jogging, stair climbing, dancing, or lifting weights) strengthens bone formation and helps prevent the osteoporosis or bone loss often seen in women after menopause. Combine a diet rich in calcium and vitamin D with
regular weight-bearing exercise for maximum results.
According to The Journal of the American Medical Association, data from the Nurses' Health Study showed that women who walked four or more hours per week had 41% fewer hip fractures than those who walked less than an hour a week.
Researchers at Duke University suggest that the amount of physical activity, rather than its intensity, has the biggest impact on improving blood lipids (cholesterol). According to The New England Journal of Medicine, these researchers also found that any exercise is better than none -- although more is better.
2. Stroke : In an analysis of 23 studies, researchers found that being active reduces your risk of having and dying from a stroke. According to a study published in the journal Stroke, moderately active study participants had 20% less risk of stroke than less active participants.
3. Type II Diabetes : This disease is increasing at alarming rates -- by 62% since 1990 -- and 17 million Americans now have it. Physical activity can enhance weight loss and help prevent and/or control this condition. Losing weight can increase insulin sensitivity, improve blood sugar and cholesterol levels, and reduce blood pressure -- all of which are very important to the health of people with diabetes.
In a study published in the Annals of Internal Medicine, Frank Hu, MD, of the Harvard School of Public Health found that a brisk walk for one hour daily could reduce the risk of type II diabetes by 34%.
4. Obesity : Overweight and obese conditions can be prevented or treated with exercise along with a healthy diet. Activity helps to reduce body fat and increase muscle mass, thus improving your body's ability to burn calories. The combination of reduced calories and daily exercise is the ticket to weight loss. And controlling obesity is critical, as it is a major risk factor for many diseases. Lowering your body mass index (BMI) is a sure way to reduce your risk of dying early and to live a healthier life.
5. Back Pain : Back pain can be managed or prevented with a fitness program that includes muscle strengthening and flexibility. Having good posture and a strong abdomen is the body's best defense against back pain.
6. Osteoporosis : Weight-bearing exercise (such as walking, jogging, stair climbing, dancing, or lifting weights) strengthens bone formation and helps prevent the osteoporosis or bone loss often seen in women after menopause. Combine a diet rich in calcium and vitamin D with
regular weight-bearing exercise for maximum results.
According to The Journal of the American Medical Association, data from the Nurses' Health Study showed that women who walked four or more hours per week had 41% fewer hip fractures than those who walked less than an hour a week.
Exercise and Fitness
Fact: Regular physical activity - even at moderate levels - reduces the risk of heart disease, cancer, high blood pressure, and obesity. Here?s another fact: 65% of Americans are considered obese. So while the risks associated with not exercising are clear, we don't seem to be doing anything to change our sedentary ways.
Benefits of Exercise
What if someone told you that a thinner, healthier, and longer life was within your grasp? Sound too good to be true? According to a wealth of research, exercise is the silver bullet for a better quality of life.
Not only does regular exercise aid in weight loss, it reduces your risk for several chronic diseases and conditions. Finding activities that you enjoy and that become part of your daily routine is the key to a long and healthy life.
The list of health benefits is impressive, and the requirements are relatively simple -- just do it.
Ward Off Disease
Research has confirmed that any amount of exercise, at any age, is beneficial. And, in general, the more you do, the greater the benefits. The National Academy of Sciences has recommended that everyone strive for a total of an hour per day of physical activity. Sounds like a lot, but the hour can be made up of several shorter bursts of activity (it can be walking, gardening, even heavy housecleaning) done throughout the day.
Physical activity is an essential part of any weight-loss program, to maximize your fat loss while keeping valuable muscle mass. But exercise has many other health and longevity benefits. It can help prevent or improve these conditions
Benefits of Exercise
What if someone told you that a thinner, healthier, and longer life was within your grasp? Sound too good to be true? According to a wealth of research, exercise is the silver bullet for a better quality of life.
Not only does regular exercise aid in weight loss, it reduces your risk for several chronic diseases and conditions. Finding activities that you enjoy and that become part of your daily routine is the key to a long and healthy life.
The list of health benefits is impressive, and the requirements are relatively simple -- just do it.
Ward Off Disease
Research has confirmed that any amount of exercise, at any age, is beneficial. And, in general, the more you do, the greater the benefits. The National Academy of Sciences has recommended that everyone strive for a total of an hour per day of physical activity. Sounds like a lot, but the hour can be made up of several shorter bursts of activity (it can be walking, gardening, even heavy housecleaning) done throughout the day.
Physical activity is an essential part of any weight-loss program, to maximize your fat loss while keeping valuable muscle mass. But exercise has many other health and longevity benefits. It can help prevent or improve these conditions
Diet :: Believing everything you read about nutrition and weight loss.
"Just because someone writes a diet book or a nutrition guide does not mean they are an expert," cautions Brandeis.
If you're turning to a book for guidance, she says, "look to the author's credentials and ask yourself: Is this person a dietician; do they have an advanced degree in nutrition? Or are you buying this book because it's written by a celebrity who you think looks good?"
Even if an "expert" is behind your nutrition or diet plan, Brandeis says, it's important to make sure the plan is based on solid research.
"Has the plan been tried on 20 people or 200 people? Have the results been published in a peer-reviewed medical journal -- or is it based solely on anecdotal reports? These are things that I fear many people don't pay attention to before paying attention to what is being said -- and that is a huge mistake," says Brandeis.
Perhaps even more important: Experts say there is no one diet or nutrition plan that is right for every person.
Brandeis tells WebMD that dieters need to stop blaming themselves when a plan doesn't work for them. It's not them, she says. It may not even be the plan. "It's just not the correct match," she says.
The solution:
Before following a particular diet or nutrition plan, check the credentials of the author or creator. Look for plans that are backed up by published medical data, and supported by the opinions of many experts in the field.
If you're turning to a book for guidance, she says, "look to the author's credentials and ask yourself: Is this person a dietician; do they have an advanced degree in nutrition? Or are you buying this book because it's written by a celebrity who you think looks good?"
Even if an "expert" is behind your nutrition or diet plan, Brandeis says, it's important to make sure the plan is based on solid research.
"Has the plan been tried on 20 people or 200 people? Have the results been published in a peer-reviewed medical journal -- or is it based solely on anecdotal reports? These are things that I fear many people don't pay attention to before paying attention to what is being said -- and that is a huge mistake," says Brandeis.
Perhaps even more important: Experts say there is no one diet or nutrition plan that is right for every person.
Brandeis tells WebMD that dieters need to stop blaming themselves when a plan doesn't work for them. It's not them, she says. It may not even be the plan. "It's just not the correct match," she says.
The solution:
Before following a particular diet or nutrition plan, check the credentials of the author or creator. Look for plans that are backed up by published medical data, and supported by the opinions of many experts in the field.
Diet :: Excluding exercise
While most folks believe nutrition is all about food, Brandeis says it's also about how your body uses food -- and that's where regular exercise comes in.
"Without adequate exercise, you cannot maintain a high enough metabolic rate to burn your food efficiently," says Brandeis. "A pill can't do that for you; foods alone can't do that for you. Exercise is the only way to achieve it."
The solution:
Make exercise a regular part of your life. And don't get hung up if you can't do it at the same time every day. If you miss your routine in the morning, don't wait until the next day and try to do twice as much. Instead, try to fit in some exercise -- even if it's just a little bit -- every day, says Taub-Dix.
"Without adequate exercise, you cannot maintain a high enough metabolic rate to burn your food efficiently," says Brandeis. "A pill can't do that for you; foods alone can't do that for you. Exercise is the only way to achieve it."
The solution:
Make exercise a regular part of your life. And don't get hung up if you can't do it at the same time every day. If you miss your routine in the morning, don't wait until the next day and try to do twice as much. Instead, try to fit in some exercise -- even if it's just a little bit -- every day, says Taub-Dix.
Diet :: Taking too many supplements
"People tend to forget that a vitamin pill is a supplement -- it's meant to complement your diet, not act as a stand-in for the foods you don't eat," says Heller. What's more, she says, taking too many vitamins can end up sabotaging your good health.
"Every vitamin and mineral and phytochemical in our body works in concert with one another, and it's easy to knock that balance off if you are taking concentrated doses of single nutrients, or even groups of nutrients," says Heller.
Bradeis cautions that any diet plan that claims you must take a high-potency supplement to meet your nutritional needs should send up a red flag.
"It means that eating plan is not healthy," says Brandeis, "and it also means you are going to miss out on the synergistic health effects that can only come from whole foods -- including not only helping you to feel fuller longer, but also preventing cellular breakdowns important to preventing disease."
The solution:
Both experts recommend taking no more than one all-purpose multivitamin daily. Don't supplement your diet with individual nutrients without the guidance of your doctor, nutritionist, or other health expert. Keep in mind that the sales clerk in the health food store is usually not a health expert.
"Every vitamin and mineral and phytochemical in our body works in concert with one another, and it's easy to knock that balance off if you are taking concentrated doses of single nutrients, or even groups of nutrients," says Heller.
Bradeis cautions that any diet plan that claims you must take a high-potency supplement to meet your nutritional needs should send up a red flag.
"It means that eating plan is not healthy," says Brandeis, "and it also means you are going to miss out on the synergistic health effects that can only come from whole foods -- including not only helping you to feel fuller longer, but also preventing cellular breakdowns important to preventing disease."
The solution:
Both experts recommend taking no more than one all-purpose multivitamin daily. Don't supplement your diet with individual nutrients without the guidance of your doctor, nutritionist, or other health expert. Keep in mind that the sales clerk in the health food store is usually not a health expert.
Diet :: Not eating enough -- or often enough.
While overeating and undereating may seem like contradictory nutrition mistakes, they are related.
"If you don't eat at regular intervals throughout the day, you risk disrupting your blood sugar and insulin levels, which in the end can promote fat storage and lower your metabolism -- both of which lead to weight gain," Brandeis says.
The solution:
Eat something every four hours and never let yourself "starve" from one meal to the next, Brandeis says.
"If you don't eat at regular intervals throughout the day, you risk disrupting your blood sugar and insulin levels, which in the end can promote fat storage and lower your metabolism -- both of which lead to weight gain," Brandeis says.
The solution:
Eat something every four hours and never let yourself "starve" from one meal to the next, Brandeis says.
Diet :: Eating too much
Whether you're filling your plate with low-fat, low-carb, or even healthy, nutritionally balanced foods, overestimating how much food your body needs is among the most common mistakes, experts say.
"Many people believe they should feel not just satisfied after a meal, but stuffed," says Heller. "I think many of us have lost touch with the sensation of having had enough food."
Adds Taub-Dix: "People also tend to believe that they can eat larger portions if all the food on their plate meets the guidelines of their current diet -- such as low-carb or low-fat -- and that, of course, is also not true."
The solution: Remain conscious of portion sizes. Weigh and measure standard portions, at least at first, so you'll know what the amounts should look like. And, says Brandeis, "never use restaurant portions as your guide -- they super-size everything."
"Many people believe they should feel not just satisfied after a meal, but stuffed," says Heller. "I think many of us have lost touch with the sensation of having had enough food."
Adds Taub-Dix: "People also tend to believe that they can eat larger portions if all the food on their plate meets the guidelines of their current diet -- such as low-carb or low-fat -- and that, of course, is also not true."
The solution: Remain conscious of portion sizes. Weigh and measure standard portions, at least at first, so you'll know what the amounts should look like. And, says Brandeis, "never use restaurant portions as your guide -- they super-size everything."
Wednesday, August 15, 2007
Chocolate Lowers Blood Pressure
Dark Chocolate, Other Cocoa-Rich Foods May Lower Blood Pressure Better Than Tea
By
Jennifer Warner
WebMD Medical News
A chocolate treat may be better than green or black tea at keeping high blood pressure in check.
A new study suggests that dark chocolate and other cocoa-rich products may be better at lowering blood pressure than tea.
Researchers compared the blood pressure-lowering effects of cocoa and tea in? previously published studies and found eating cocoa-rich foods was associated with an average 4.7-point lower systolic blood pressure (the top number in a blood pressure reading) and 2.8-point lower diastolic blood pressure (the bottom number). But no such effect was found among any of the studies on black or green tea.
Cocoa and tea are both rich in a class of antioxidants known as polyphenols. But researchers say they contain different types of polyphenols, and those in cocoa may be more effective at lowering blood pressure.
Polyphenols Help Blood Pressure
Current guidelines call for people with high blood pressure to eat a diet rich in fruits and vegetables, which are also high in polyphenols. These compounds are thought to contribute to their beneficial effects on protecting against heart disease and high blood pressure.
But researchers say there are no current recommendations for people at risk for high blood pressure or heart disease to include polyphenol-rich cocoa and tea products in their diet, despite the fact that tea and cocoa products account for the bulk of people?s total intake of polyphenols in Western countries.
In their review, researchers reviewed the effects of cocoa-rich products, such as dark chocolate or specially formulated polyphenol-rich milk chocolate, and blood pressure in five studies, which totaled 173 participants and lasted on average two weeks.
They also reviewed black and green tea and blood pressure in five different studies that totaled 343 participants and lasted on average four weeks. All studies were published between 1966 and 2006.
The results showed four of the five cocoa studies reported a reduction in both systolic blood pressure and diastolic blood pressure. The reduction was an average of 4.7 points systolic and 2.8 points diastolic.
Researchers say those effects are similar to those found using one-drug therapy with common blood pressure-lowering medications such as beta-blockers and ACE inhibitors.
None of the five studies on green or black tea were associated with any significant reduction in blood pressure.
Cocoa to the Rescue
Applied to the population as a whole, researchers estimate that the blood pressure-lowering effect associated with cocoa would be expected to reduce the risk of stroke by about 20%, coronary heart disease by 10%, and death from all causes by 8%.
However, they say their findings should not be interpreted as a widespread recommendation to raid the candy counter.
But they say it appears reasonable to substitute polyphenol-rich cocoa products like dark chocolate for other high-calorie or high-fat desserts, such as having a piece of dark chocolate rather than a slice of cheesecake.
"We believe that any dietary advice must account for the high sugar, fat, and calorie intake with most cocoa products," write researcher Dirk Taubert, MD, PhD, of the University Hospital of Cologne in Germany, and colleagues, in the Archives of Internal Medicine.? "Rationally applied, cocoa products might be considered part of dietary approaches to lower hypertension risk."
By
Jennifer Warner
WebMD Medical News
A chocolate treat may be better than green or black tea at keeping high blood pressure in check.
A new study suggests that dark chocolate and other cocoa-rich products may be better at lowering blood pressure than tea.
Researchers compared the blood pressure-lowering effects of cocoa and tea in? previously published studies and found eating cocoa-rich foods was associated with an average 4.7-point lower systolic blood pressure (the top number in a blood pressure reading) and 2.8-point lower diastolic blood pressure (the bottom number). But no such effect was found among any of the studies on black or green tea.
Cocoa and tea are both rich in a class of antioxidants known as polyphenols. But researchers say they contain different types of polyphenols, and those in cocoa may be more effective at lowering blood pressure.
Polyphenols Help Blood Pressure
Current guidelines call for people with high blood pressure to eat a diet rich in fruits and vegetables, which are also high in polyphenols. These compounds are thought to contribute to their beneficial effects on protecting against heart disease and high blood pressure.
But researchers say there are no current recommendations for people at risk for high blood pressure or heart disease to include polyphenol-rich cocoa and tea products in their diet, despite the fact that tea and cocoa products account for the bulk of people?s total intake of polyphenols in Western countries.
In their review, researchers reviewed the effects of cocoa-rich products, such as dark chocolate or specially formulated polyphenol-rich milk chocolate, and blood pressure in five studies, which totaled 173 participants and lasted on average two weeks.
They also reviewed black and green tea and blood pressure in five different studies that totaled 343 participants and lasted on average four weeks. All studies were published between 1966 and 2006.
The results showed four of the five cocoa studies reported a reduction in both systolic blood pressure and diastolic blood pressure. The reduction was an average of 4.7 points systolic and 2.8 points diastolic.
Researchers say those effects are similar to those found using one-drug therapy with common blood pressure-lowering medications such as beta-blockers and ACE inhibitors.
None of the five studies on green or black tea were associated with any significant reduction in blood pressure.
Cocoa to the Rescue
Applied to the population as a whole, researchers estimate that the blood pressure-lowering effect associated with cocoa would be expected to reduce the risk of stroke by about 20%, coronary heart disease by 10%, and death from all causes by 8%.
However, they say their findings should not be interpreted as a widespread recommendation to raid the candy counter.
But they say it appears reasonable to substitute polyphenol-rich cocoa products like dark chocolate for other high-calorie or high-fat desserts, such as having a piece of dark chocolate rather than a slice of cheesecake.
"We believe that any dietary advice must account for the high sugar, fat, and calorie intake with most cocoa products," write researcher Dirk Taubert, MD, PhD, of the University Hospital of Cologne in Germany, and colleagues, in the Archives of Internal Medicine.? "Rationally applied, cocoa products might be considered part of dietary approaches to lower hypertension risk."
Tip: Choose Your Chocolate Carefully
Some kinds of chocolate, rich in antioxidants called flavonoids, have been shown to benefit heart health. But all types of chocolate aren't the same, and too much chocolate can negate any benefits, the Cleveland Clinic says.
The clinic offers this additional information:
Dark chocolate is richest in flavonoids, so choose dark chocolate over milk chocolate.
Chocolate does contain fat, but it contains both saturated (unhealthy) and unsaturated (healthy) fats. Chocolate should still only be consumed in small amounts.
Processed chocolate is higher in fat and lower in flavonoids, so avoid candy bars loaded with caramel, peanuts, nougat and other fattening fillings.
The clinic offers this additional information:
Dark chocolate is richest in flavonoids, so choose dark chocolate over milk chocolate.
Chocolate does contain fat, but it contains both saturated (unhealthy) and unsaturated (healthy) fats. Chocolate should still only be consumed in small amounts.
Processed chocolate is higher in fat and lower in flavonoids, so avoid candy bars loaded with caramel, peanuts, nougat and other fattening fillings.
Diet :: Being confused about carbs.
A national fascination with low-carb diets has many Americans eliminating carbohydrates from their eating plans in record "grams." But before you reconstruct your personal nutrition pyramid, there's something you should know.
"There are carbs that are very, very good, and some that are less good, but your brain and body must have some carbohydrates every day," says Heller.
Moreover, because complex carbohydrates (those rich in whole grains and fiber) keep you feeling full longer, they also help you to eat less -- and lose more!
But eliminating this important food group isn't our only carb-related mistake. According to dietician Rachel Brandeis, MS, RD, just as troublesome is the belief that all no-carb or low-carb foods are healthy, or that you can eat them in any amount.
"Much like the low-fat diet craze, where everyone thought that if a meal had no fat, it had no calories, similarly people have come to believe that if it has low carbs you can eat as much as you want and not gain weight," says Brandeis. "And that is simply not true." Eat enough of anything, she says, and you'll gain weight.
The solution:
Experts say you should never cut any food group out of your diet -- including carbohydrates. Equally important, says Heller, is to learn which carbohydrates give you the biggest bang for your nutritional buck.
"It's a lot harder to run amuck when you are including carbohydrates like fresh fruits and vegetables and whole grains in your diet," says Heller.
"There are carbs that are very, very good, and some that are less good, but your brain and body must have some carbohydrates every day," says Heller.
Moreover, because complex carbohydrates (those rich in whole grains and fiber) keep you feeling full longer, they also help you to eat less -- and lose more!
But eliminating this important food group isn't our only carb-related mistake. According to dietician Rachel Brandeis, MS, RD, just as troublesome is the belief that all no-carb or low-carb foods are healthy, or that you can eat them in any amount.
"Much like the low-fat diet craze, where everyone thought that if a meal had no fat, it had no calories, similarly people have come to believe that if it has low carbs you can eat as much as you want and not gain weight," says Brandeis. "And that is simply not true." Eat enough of anything, she says, and you'll gain weight.
The solution:
Experts say you should never cut any food group out of your diet -- including carbohydrates. Equally important, says Heller, is to learn which carbohydrates give you the biggest bang for your nutritional buck.
"It's a lot harder to run amuck when you are including carbohydrates like fresh fruits and vegetables and whole grains in your diet," says Heller.
Diet:: Assuming your choices are better than they actually are.
From fruit juices to canned vegetable soup, breakfast muffins to seven-grain bread, it's easier to think your food choices are healthier than they really are, experts tell WebMD.
"If a label says 'Seven-Grain Bread,' it sounds pretty healthy, right? But unless that label also says 'whole grains' it's not necessarily going to be the healthiest bread choice you could make," Heller says.
Likewise, she says many folks think that eating a can of vegetable soup is as nutritious as downing a plateful of veggies -- not realizing how few vegetables are inside, and how much of the nutrients are lost in processing.
Another common mistake: Substituting fruit juices for whole fruits.
"Are fruit juices healthier than soda? Yes. But they are also concentrated sources of sugar that don't give you anywhere near the same level of nutrients you get from whole fruits," says Bonnie Taub-Dix, MA, RD. What's more, says Taub-Dix, if you're trying to lose weight, you won't get the same sense of fullness from a glass of juice that you will from a piece of fruit.
"Instead, you'll just take in a whole lot of calories -- and still feel hungry," Taub-Dix says.
The solution:
Whenever possible, eat whole, fresh, and unprocessed foods. Even when you eat them in smaller amounts, you're likely to get a well-rounded group of nutrients. When buying packaged foods, put in at least as much time into reading labels and selecting products as you do when choosing a shower gel or shampoo.
"Don't just assume a product is healthy -- even if it's in the health food section of the supermarket," says Heller. "You've got to read the labels."
"If a label says 'Seven-Grain Bread,' it sounds pretty healthy, right? But unless that label also says 'whole grains' it's not necessarily going to be the healthiest bread choice you could make," Heller says.
Likewise, she says many folks think that eating a can of vegetable soup is as nutritious as downing a plateful of veggies -- not realizing how few vegetables are inside, and how much of the nutrients are lost in processing.
Another common mistake: Substituting fruit juices for whole fruits.
"Are fruit juices healthier than soda? Yes. But they are also concentrated sources of sugar that don't give you anywhere near the same level of nutrients you get from whole fruits," says Bonnie Taub-Dix, MA, RD. What's more, says Taub-Dix, if you're trying to lose weight, you won't get the same sense of fullness from a glass of juice that you will from a piece of fruit.
"Instead, you'll just take in a whole lot of calories -- and still feel hungry," Taub-Dix says.
The solution:
Whenever possible, eat whole, fresh, and unprocessed foods. Even when you eat them in smaller amounts, you're likely to get a well-rounded group of nutrients. When buying packaged foods, put in at least as much time into reading labels and selecting products as you do when choosing a shower gel or shampoo.
"Don't just assume a product is healthy -- even if it's in the health food section of the supermarket," says Heller. "You've got to read the labels."
Hi Everybody
All we know health is wealth.But maybe we dont know how we can take proper care of our health. Here I will try to share some essential but simple health care information. May be it will be helpful for us.
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