Validity of bioelectrical impedance equations for estimating fat-free weight in high school female gymnasts

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

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The present study examined the validity of bioelectrical impedance (BIA) equations for estimating fat-free weight (FFW) in female gymnasts by comparing the values to those obtained from underwater weighing (UWW). Ninety-seven female Caucasian high school gymnasts (X age ± SD = 15.7 ± 1.1 yr) participated in the study. FFW from UWW was calculated from percent fat using the revised formula of Brozek et al. (5 (X FFW ± SD = 43.8 ± 4.5 kg) and the age-specific constants of Lohman (28) (X FFW ± SD = 44.8 ± 4.6 kg). Cross-validation analyses included examination of the constant error (CE), SEE, r, and total error (TE). The results indicated similar trends between equations when based on either the Brozek or Lohman conversions; however, the CE, SEE, and TE values were consistently lower for the majority of the equations using the revised formula of Brozek et al. (5). Based upon the results of the cross-validation analyses, the equation of Houtkooper et al. (22) and the interlaboratory equations of Van Loan et al. (50) and Lohman (29), which resulted in identical TE values of 2.4 kg are recommended for use with young high school gymnasts.

Original languageEnglish (US)
Pages (from-to)962-968
Number of pages7
JournalMedicine and science in sports and exercise
Volume29
Issue number7
DOIs
StatePublished - Jul 1 1997

Keywords

  • Bioelectrical impedance analysis
  • Body composition
  • Cross-validation
  • Underwater weighing

ASJC Scopus subject areas

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

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