Ideally, weight loss (or weight gain) programs should not only be targeted at reducing (or increasing) overall weight but should provide some measure of change in lean mass and body fat. Infrared interactance involves shining infrared light through different areas of the body and studying the wavelengths in the spectrum produced.While this form of measurement is accurate, it is not practical in most settings. Hydrostatic tanks are used to calculate your body weight underwater after the lungs have been completely emptied.Calipers are normally found in health clubs and physicians offices. These readings, along with the body weight are then converted to a body fat percentage. Skinfold measurements can be performed using calipers to measure the thickness of the skin in various parts of the body. This is a convenient instrument for home use. Electrical currents travel faster through lean tissue than through fat, and it is this difference that is used in this technique. A small electrical current is sent through the body to compute the fat content of the body. Electrodes are attached to the hands and feet and the individual stands on electrode pads.
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