Association of bioelectrical resistance with estimates of fat-free mass determined by densitometry and hydrometry

American Journal of Human Biology : the Official Journal of the Human Biology Council
M D Van LoanC Carswell

Abstract

The relationship of whole-body electrical resistance (WBR) to fat-free mass, derived from densitometry (FFMDb ), hydrometry (FFMTBW ), and densitometric fat-free mass corrected for hydration (FFMD+W ) was investigated in three independent samples (AZ, IL, CA). Subjects included 75 males and 75 females ranging in age from 18 to 32 years. Whole-body resistive index (WBRI) computed as height(2) /resistance was highly correlated to FFMDb , FFMTBW , and FFMD+W (r = 0.97, 0.95, and 0.97, respectively). Multiple regression analysis was employed to develop prediction equations for FFMDb , FFMTBW , and FFMD+W . In each prediction equation, WBRI was the single best predictor. Accounting for sex and variation in body weight significantly improved the prediction equations, by increasing the R(2) s to 0.95, 0.94, and 0.96 and decreasing the SEEs to 2.6, 3.2, and 2.5 kg, for FFMDb , FFMTBW , and FFMD+W , respectively. Similarity of the SEEs between methods (less than 1.0 kg difference) suggests consistency in the precision of WBRI estimates for body composition.

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Citations

Jan 1, 1993·American Journal of Human Biology : the Official Journal of the Human Biology Council·P B SparlingB T Hinson
Oct 27, 1998·Chronobiology International·M A Rea
Feb 28, 2009·Journal of Applied Physiology·Nicolas PeyrotAlain Belli
Mar 1, 1996·Annals of Human Biology·N J FullerM Elia
Jul 1, 1997·Medicine and Science in Sports and Exercise·J M EckersonD B Smith
Jan 1, 1993·European Journal of Applied Physiology and Occupational Physiology·K TanakaF Nakadomo
Apr 1, 1996·Medicine and Science in Sports and Exercise·J M EckersonG O Johnson

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