title: Validity of near-infrared interactance (FUTREX 6100/XL) for estimating body fat percentage in elite rowers.
abstract: This investigation aimed to compare hydrostatic weighing (HW) with near-infrared interactance (NIR) and skinfold measurements (SKF) in estimating body fat percentage (FAT%) in rowing athletes. FAT% was estimated in 20 elite male rowers (mean ± SD: age = 24·8 ± 2·2 years, height = 191·0 ± 6·8 cm, weight = 86·8 ± 11·3 kg, HW FAT% = 11·50 ± 3·16%) using HW with residual volume, 3-site SKF and NIR on the biceps brachii. Predicted FAT% values for NIR and SKF were validated against the criterion method of HW. Constant error was not significant for NIR (-0·06, P = 0·955) or SKF (-0·20, P = 0·813). Neither NIR (r = 0·045) nor SKF (r = 0·229) demonstrated significant validity coefficients when compared to HW. The standard error of the estimate values for NIR and SKF were both less than 3·5%, while total error was 4·34% and 3·60%, respectively. When compared to HW, SKF and NIR provide similar mean values when compared to HW, but the lack of apparent relationships between individual values and borderline unacceptable total error may limit their application in this population.
authors.affiliation: Institute of Exercise Physiology and Wellness, University of Central Florida, Orlando, FL, USA.
authors.forename: David H
authors.initials: DH
authors.lastname: Fukuda
authors.affiliation: Austin, TX, USA.
authors.forename: Mandy E
authors.initials: ME
authors.lastname: Wray
authors.affiliation: Digital Publishing, Bodybuilding.com, Boise, ID, USA.
authors.forename: Kristina L
authors.initials: KL
authors.lastname: Kendall
authors.affiliation: Exercise and Sports Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
authors.forename: Abbie E
authors.initials: AE
authors.lastname: Smith-Ryan
authors.affiliation: Institute of Exercise Physiology and Wellness, University of Central Florida, Orlando, FL, USA.
authors.forename: Jeffrey R
authors.initials: JR
authors.lastname: Stout
mesh_terms: D050154:Adiposity; D000328:Adult; D056352:Athletes; D004867:Equipment Design; D006801:Humans; D008297:Male; D010809:Physical Fitness; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012885:Skinfold Thickness; D019265:Spectroscopy, Near-Infrared / Q000295:instrumentation*; D000073678:Water Sports; D055815:Young Adult
keywords: athletes; body composition; hydrostatic weighing; skinfolds; weight restriction