Validity of bioelectrical impedance equations for estimating fat-free mass in young athletes

Tammy K. Evetovich, Terry J. Housh, Joan M. Eckerson, Glen O. Johnson, Dona J. Housh, Jeffrey R. Stout, Douglas B. Smith, Kyle T. Ebersole

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

This study examined the validity of bioelectrical impedance (BIA) equations for estimating fat-free mass (FFM) in 117 Caucasian athletes (M age ± SD = 11 ± 2 yrs) who volunteered to undergo underwater weighing (UWW) and BIA assessment. Eleven BIA equations and a machine-generated value (BIAM) were cross-validated. Cross-validation analyses included examination of constant error (CE), standard error of estimate (SEE), r, and total error (TE). The results indicated that the equation of Guo most accurately estimated FFM due to a nonsignificant CE (p > 0.004) (0.12 kg), the lowest SEE (1.99 kg), and the lowest TE (2.09 kg). Two equations developed by Houtkooper and BIAM resulted in TE values of ≤2.69 kg and should be considered acceptable alternatives to the equation of Guo.

Original languageEnglish (US)
Pages (from-to)155-158
Number of pages4
JournalJournal of strength and conditioning research
Volume11
Issue number3
DOIs
StatePublished - Aug 1997

Keywords

  • Body composition
  • Cross-validation
  • Underwater weighing

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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    Evetovich, T. K., Housh, T. J., Eckerson, J. M., Johnson, G. O., Housh, D. J., Stout, J. R., Smith, D. B., & Ebersole, K. T. (1997). Validity of bioelectrical impedance equations for estimating fat-free mass in young athletes. Journal of strength and conditioning research, 11(3), 155-158. https://doi.org/10.1519/00124278-199708000-00004