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For example, a wide-framed healthand wellness sedentary person who puts on 20 pounds of pure fat will differ healthand wellness from the same frame body builder who puts on 20 pounds of muscle mass. So the only way to tell the real fatness is to measure the actual fat content healthand wellness in the body. There are several ways of doing this. But first let us see what our bodies' major constituents are. Of these, two principal body components are: dry matter and water. You might want to consider lean and fat matter as well, but these two are closely related because muscles contain a lot of water while fat has much less. This is the basis of measuring body fat percentage using so called electrical impedance method (or bioelectrical impedance analysis (BIA). The more water -- the easier for very low electrical current to pass through the body. However, this machine can be easily confused by such a common difference in people bodies' composition as hydration status that does not relate to the fat content.
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