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Remember that the validity of the results greatly depends on the tester and calipers. Pro: Inexpensive Accessible Reliable Valid Con: May require a skilled tester Invalid for obese people Hydrostatic Weighing This test involves suspending yourself under water seated in stretch a chair attached to a scale, usually in a pool or tank of water. The tester compares your normal body weight to your underwater weight to calculate your body density. Then your lungs' stretch residual volume is either taken directly or estimated from a formula (not as accurate) to help determine stretch bodyfat percentage. Pro: The "gold standard" in validity Very reliable Con: Time Preparation/Equipment/Location Expense Bioelectrical Impedance This test is based on the principle that the conductivity of an electrical impulse is greater through lean tissue than through fatty tissue.
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