The Estimation of the Fat Free Mass Index in Athletes
Asian Journal of Sports Medicine: 3 (3); 200-203
August 31, 2012
Article Type: Research Article
March 8, 2012
June 23, 2012
J P, Wilson
J M, Wray
M E, Barnes
J T, Kearney
M L, et al. The Estimation of the Fat Free Mass Index in Athletes,
Asian J Sports Med.
Online ahead of Print
The purpose of this investigation was to compare a practical measurement of fat free mass index (FFMI) from bioelectrical impedance analysis (BIA) to the dual energy X-ray absorptiometry (DEXA) value in collegiate athletes.
Thirty-three male baseball players and 16 female gymnasts volunteered to participate in this study during their respective pre-season. Subjects visited the laboratory once and had their measurements taken in the following order: weight, height, DEXA, and Omron HBF-500.
The BIA device investigated was not a valid estimate of FFMI when compared to the DEXA. The TE was 0.93 kg/ m 2 for males and 0.78 kg/ m 2 for females. There were also significant mean differences between the BIA prediction and the DEXA value for males (BIA=20.6 kg/m 2 vs. DEXA=21.1 kg/m 2, P=0.007) and females (BIA=16.2 kg/m 2 vs. DEXA=17.5 kg/m 2, P=0.001).
The BIA device investigated in this study did not provide a valid estimate of FFMI in male and female collegiate athletes. Although there was a general tendency for the BIA to underestimate FFMI compared to DEXA, 98% of the estimates were within plus or minus 2 kg/ m 2. Therefore, while slightly biased, BIA may provide a reasonable ( 2 kg/ m 2) estimate of nutritional status for practitioners who are unable able to afford more expensive equipment.
Body Mass Index; Body Fat; Sports; Fat Free Mass; Dual Energy X-ray Absorptiometry; DEXA Scan
© 2012, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.