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Man "A" may in fact have a higher body fat percentage than Man "C". Tanita Body Composition Analyzers determine body fat using Bio-Electric Impedance Analysis (BIA), a process by which a small electrical current is sent ironman through the body to measure the impedance, or resistance to that ironman current. Biological tissues (muscle, fat, bone, connective tissue) act either as conductors of, or insulators to, the current. The ironman current will flow through the path of least resistance. Muscle tissue, which contains about 80% water, acts as a good conductor for the current, while adipose tissue (fat), which contains very little water, acts as an insulator. Therefore, the current will travel around the adipose tissue, and through the water in the muscle. The more fat containing adipose tissue in the body, the harder the current must work to travel around that fat along the muscular structure.
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