Cordain et al reported an equation for estimating fat-free mass (FFM) in an adolescent using bioelectrical impedance. The authors are from Colorado State University.
boys 12.5 +/- 1 years; girls 11.6 +/- 0.9 years
Parameters:
(1) height in centimeters
(2) resistance in ohms at 50 kHz
fat-free mass in kilograms =
= (0.81 * ((height)^2)/(resistance)) + 6.86
Performance:
• r equals 0.83 and the SEE 4.08.
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