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How valid is the BIA technology in the estimation of total body water, fat-free mass, and adiposity?

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How valid is the BIA technology in the estimation of total body water, fat-free mass, and adiposity?

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What are the appropriate clinical uses of BIA technology, and what are the limitations? What are the future directions for basic science, clinical research, and epidemiological evaluation of body composition measurements? Question 1: What does BIA measure in terms of electrical and biological parameters, and how safe is it? What Does BIA Measure? Precisely what BIA measures in terms of electrical and biological parameters is not known and probably varies somewhat from person to person. Instruments for BIA introduce into the body a known amount of current (I ), of about 800 A, most often at a frequency of 50 kHz. The current passes between two electrodes, often called the source and sink (or detector), and generates voltages between different points in the body volume according to Ohms law. In present practice, the electrodes usually are located on the wrist and ankle. The current flows through all conducting material present in the body in the path between the source and sink electrode

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