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Fitness & Exercise

Exercise and Fitness Tips to Improve Your Health

Get answers to your questions about exercise, and tips for getting the most from your workouts.
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WebMD Weight Loss Clinic-Feature
Reviewed by Louise Chang, MD

Are you getting started with an exercise program? Hoping to improve your existing routines or find new workout options? Did you know that a complete plan consists of three basic elements: aerobic fitness, muscle strength/endurance and flexibility? How do you assess your current fitness level before you begin? How do you know how much exercise you should do, or whether you should see a doctor before you start?

Our Healthy Living channel provides in-depth answers to these questions, along with guidelines to help you develop a fitness program that's right for you. With these exercise and fitness tips, you can learn to gauge how hard and how often you should exercise, and get yourself started on the road to better fitness today.

Q. Why do you use the BMI, and is it useful for weight lifters?

The Body Mass Index (BMI) is a simple way for men and women to estimate body fat based on their height and weight. From the BMI, it is possible to determine your healthy weight range.

One of the limitations of BMI is that it can overpredict overweight or obesity in people who are lean and muscular. For instance, someone who is 5 feet 10 inches tall and weighs 220 pounds, with 12% body fat, would be considered obese based on BMI standards. Obviously, someone with 12% body fat is not obese.

The scientists who developed the BMI guidelines readily admit to this limitation. But their rationale is that most Americans are not lean and muscular and so for most people, the BMI is an accurate assessment of body fat and increased health risk.

It is important to know that people who are classified as overweight or obese can still be healthy as long as they are fit. In one well-known study, fit people with BMIs that classified them as overweight or obese were healthier and lived longer than unfit people who were at normal weight.

The BMI, for the majority of Americans, is the most up-to-date and scientifically sound method available for determining healthy weight.

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