Question

Which body composition assessment method requires normal body fluid levels, use of a proper prediction equation, requires a fast for 4 hours prior, and that no alcohol should be consumed within 48 hours of the test

Answer 1

The body composition assessment method mentioned in the question is Bioelectric impedance analysis.

The rate at which an electrical current move through the body is used as the basis for the bioelectrical impedance analysis (BIA), which is a method for measuring body composition. When compared to lean mass, body fat (also known as adipose tissue) creates a higher level of resistance (impedance), which in turn reduces the rate at which the current travels. Bioelectrical impedance analysis is the method that BIA scales use to calculate one's body fat percentage.

Different body tissues allow electrical current to move at different speeds. Fat is more resistive than either muscle or water, hence the greater the resistance, the more likely it is that the body fat % estimate will be higher. The majority of scales provide weight and percentage estimation of the total body fat, muscle, bone and water.

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