Where's Your Body Fat?
A lot of attention has focused lately on how heavy Americans are becoming. In fact, more than 123 million Americans are overweight or obese, putting them at greater risk for cardiovascular disease, stroke, cancer and diabetes.
Women with more than 30 percent body fat and men with more than 25 percent body fat are obese. To measure body fat, health professionals use a variety of methods, including underwater weighing, skin-fold calipers, bioelectrical impedance, dual energy X-ray absorptiometry (DEXA) and air displacement using a device called the Bod Pod. The most accurate methods are underwater weighing and DEXA, but these are generally offered only by research institutions and universities. Calipers and bioelectrical impedance machines are widely used by fitness centers and weight-loss programs, but they are not as accurate.
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