Validity of bioelectrical impedance equations for estimating fat-free weight in lean males

Joan Eckerson, Terry J. Housh, Glen O. Johnson

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The present study examined the validity of bioelectrical impedance (BJA) equations for estimating fat-free weight (FFW) in lean males (X ± SD = 9.1 ± 2.2% fat) by comparing the estimates with values obtained from underwater weighing. Sixty-eight Caucasian male volunteers served as subjects. Cross-validation analyses included examination of the constant error (CE), standard error of the estimate (SEE), r, and total error (TE). The results indicated that the equations of Oppliger et al. (16), which resulted in small TE (1.70 kg) and CE (−0.02 kg) values, most accurately estimated FFW. Simple linear regression showed that FFW was more highly correlated with body weight (BW) (r = 0.98, P<0.0001) and resulted in a lower SEE (1.68 kg) than cither height2/resistance (Ht2/R) (r = 0.81, P <0.0001; SEE = 5.12 kg) or the independent variable (weight X resistance)/height2[WR/Ht2] utilized by the manufacturer of the BIA analyzer (r = 0.15, P > 0.05; SEE = 8.59 kg). Multiple regression showed that when WR/Ht2, Ht2/R, resistance, body mass index, Ht2, and/or Ht was added to the prediction equation, which utilized BW alone, they accounted for less than 1% additional variance and reduced the SEE by SO. 16 kg. The results indicated that BW alone estimated FFW as accurately as any of the BIA equations in lean males.

Original languageEnglish
Pages (from-to)1298-1302
Number of pages5
JournalMedicine and Science in Sports and Exercise
Volume24
Issue number11
StatePublished - 1992
Externally publishedYes

Fingerprint

Electric Impedance
Fats
Weights and Measures
Body Weight
Volunteers
Linear Models
Body Mass Index

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Public Health, Environmental and Occupational Health

Cite this

Validity of bioelectrical impedance equations for estimating fat-free weight in lean males. / Eckerson, Joan; Housh, Terry J.; Johnson, Glen O.

In: Medicine and Science in Sports and Exercise, Vol. 24, No. 11, 1992, p. 1298-1302.

Research output: Contribution to journalArticle

@article{6b81f39d931d430b8cfcbb7fcd01c65e,
title = "Validity of bioelectrical impedance equations for estimating fat-free weight in lean males",
abstract = "The present study examined the validity of bioelectrical impedance (BJA) equations for estimating fat-free weight (FFW) in lean males (X ± SD = 9.1 ± 2.2{\%} fat) by comparing the estimates with values obtained from underwater weighing. Sixty-eight Caucasian male volunteers served as subjects. Cross-validation analyses included examination of the constant error (CE), standard error of the estimate (SEE), r, and total error (TE). The results indicated that the equations of Oppliger et al. (16), which resulted in small TE (1.70 kg) and CE (−0.02 kg) values, most accurately estimated FFW. Simple linear regression showed that FFW was more highly correlated with body weight (BW) (r = 0.98, P<0.0001) and resulted in a lower SEE (1.68 kg) than cither height2/resistance (Ht2/R) (r = 0.81, P <0.0001; SEE = 5.12 kg) or the independent variable (weight X resistance)/height2[WR/Ht2] utilized by the manufacturer of the BIA analyzer (r = 0.15, P > 0.05; SEE = 8.59 kg). Multiple regression showed that when WR/Ht2, Ht2/R, resistance, body mass index, Ht2, and/or Ht was added to the prediction equation, which utilized BW alone, they accounted for less than 1{\%} additional variance and reduced the SEE by SO. 16 kg. The results indicated that BW alone estimated FFW as accurately as any of the BIA equations in lean males.",
author = "Joan Eckerson and Housh, {Terry J.} and Johnson, {Glen O.}",
year = "1992",
language = "English",
volume = "24",
pages = "1298--1302",
journal = "Medicine and Science in Sports and Exercise",
issn = "0195-9131",
publisher = "Lippincott Williams and Wilkins",
number = "11",

}

TY - JOUR

T1 - Validity of bioelectrical impedance equations for estimating fat-free weight in lean males

AU - Eckerson, Joan

AU - Housh, Terry J.

AU - Johnson, Glen O.

PY - 1992

Y1 - 1992

N2 - The present study examined the validity of bioelectrical impedance (BJA) equations for estimating fat-free weight (FFW) in lean males (X ± SD = 9.1 ± 2.2% fat) by comparing the estimates with values obtained from underwater weighing. Sixty-eight Caucasian male volunteers served as subjects. Cross-validation analyses included examination of the constant error (CE), standard error of the estimate (SEE), r, and total error (TE). The results indicated that the equations of Oppliger et al. (16), which resulted in small TE (1.70 kg) and CE (−0.02 kg) values, most accurately estimated FFW. Simple linear regression showed that FFW was more highly correlated with body weight (BW) (r = 0.98, P<0.0001) and resulted in a lower SEE (1.68 kg) than cither height2/resistance (Ht2/R) (r = 0.81, P <0.0001; SEE = 5.12 kg) or the independent variable (weight X resistance)/height2[WR/Ht2] utilized by the manufacturer of the BIA analyzer (r = 0.15, P > 0.05; SEE = 8.59 kg). Multiple regression showed that when WR/Ht2, Ht2/R, resistance, body mass index, Ht2, and/or Ht was added to the prediction equation, which utilized BW alone, they accounted for less than 1% additional variance and reduced the SEE by SO. 16 kg. The results indicated that BW alone estimated FFW as accurately as any of the BIA equations in lean males.

AB - The present study examined the validity of bioelectrical impedance (BJA) equations for estimating fat-free weight (FFW) in lean males (X ± SD = 9.1 ± 2.2% fat) by comparing the estimates with values obtained from underwater weighing. Sixty-eight Caucasian male volunteers served as subjects. Cross-validation analyses included examination of the constant error (CE), standard error of the estimate (SEE), r, and total error (TE). The results indicated that the equations of Oppliger et al. (16), which resulted in small TE (1.70 kg) and CE (−0.02 kg) values, most accurately estimated FFW. Simple linear regression showed that FFW was more highly correlated with body weight (BW) (r = 0.98, P<0.0001) and resulted in a lower SEE (1.68 kg) than cither height2/resistance (Ht2/R) (r = 0.81, P <0.0001; SEE = 5.12 kg) or the independent variable (weight X resistance)/height2[WR/Ht2] utilized by the manufacturer of the BIA analyzer (r = 0.15, P > 0.05; SEE = 8.59 kg). Multiple regression showed that when WR/Ht2, Ht2/R, resistance, body mass index, Ht2, and/or Ht was added to the prediction equation, which utilized BW alone, they accounted for less than 1% additional variance and reduced the SEE by SO. 16 kg. The results indicated that BW alone estimated FFW as accurately as any of the BIA equations in lean males.

UR - http://www.scopus.com/inward/record.url?scp=0026474809&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026474809&partnerID=8YFLogxK

M3 - Article

VL - 24

SP - 1298

EP - 1302

JO - Medicine and Science in Sports and Exercise

JF - Medicine and Science in Sports and Exercise

SN - 0195-9131

IS - 11

ER -