Harvard Heart Letter

Weighing in on the value of the body mass index

Your BMI estimates your body fat better than the number on a scale. But a tape measure is an equally important tool. The body mass index (BMI), a measurement derived from the relationship between your weight and your height (see box), is a common way to estimate body fat. Itís a simple, fast, and essentially free tool that enables doctors to help identify people who might be at risk for health…

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