Please use this identifier to cite or link to this item:
Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Errors in Dual Energy X-Ray Absorptiometry Estimation of Body Composition Induced by Hypohydration
Authors: Rodriguez-Sanchez, Nidia
Galloway, S D
Contact Email:
Keywords: Fat-free soft tissue mass
fat mass
Issue Date: Feb-2015
Publisher: Human Kinetics
Citation: Rodriguez-Sanchez N & Galloway SD (2015) Errors in Dual Energy X-Ray Absorptiometry Estimation of Body Composition Induced by Hypohydration, International Journal of Sport Nutrition and Exercise Metabolism, 25 (1), pp. 60-68.
Abstract: Dual energy X-ray absorptiometry (DXA) is a popular tool to determine body composition (BC) in athletes, and is used for analysis of fat-free soft tissue mass (FFST) or fat mass (FM) gain/loss in response to exercise or nutritional interventions. The aim of the present study was to assess the effect of exercise-heat stress induced hypohydration (HYP, >2% of body mass (BM) loss) vs. maintenance of euhydration (EUH) on DXA estimates of BC, sum of skinfolds (SF), and impedance (Berk et al.) measurements in athletes. Competitive athletes (23 males and 15 females) recorded morning nude BM for 7 days prior to the first main trial. Measurements on the first trial day were conducted in a EUH condition, and again after exercise-heat stress induced HYP. On the second trial day, fluid and electrolyte losses were replaced during exercise using a sports drink. A reduction in total BM (1.6±0.4 kg; 2.3±0.4% HYP) and total LM (1.3±0.4 kg), mainly from trunk (1.1±0.5 kg), was observed using DXA when participants were HYP, reflecting the sweat loss. Estimated fat percent increased (0.3±0.3%), however, total FM did not change (0.1±0.2 kg). SF and IMP declined with HYP (losses of 1.5±2.9% and 1.6±3% respectively) suggesting FM loss. When EUH was maintained there were no significant changes in BM, DXA estimates, or SF values pre to post exercise, but IMP still declined. We conclude that use of DXA for LM assessment in athletes must ensure a EUH state, particularly when considering changes associated with nutritional or exercise interventions.
Type: Journal Article
DOI Link:
Rights: Publisher policy allows this work to be made available in this repository. To be published in International Journal of Sport Nutrition and Exercise Metabolism, 2015, Volume 25 Issue 1, pp. 60-68 by Human Kinetics. The original publication is available at:
Affiliation: University of Stirling

Files in This Item:
File Description SizeFormat 
Rodriguez-Sanchez_ijsnem.2014-0067-in press.pdf952.08 kBAdobe PDFView/Open

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.