Journal article
Effects of Exercise Sessions on DXA Measurements of Body Composition in Active People
Medicine and Science in Sports and Exercise, Vol.45(1), pp.148-185
2013
PMID: 22895377
Abstract
Dual-energy x-ray absorptiometry (DXA) is rapidly becoming more accessible and popular as a technique to monitor body composition, especially in athletic populations. This study investigates the reliability of DXA in measuring body composition of active individuals, specifically to ascertain biological variability associated with two different types of exercise under free-living conditions in active individuals. Methods: Well-trained individuals (27 strength-trained male subjects, 14 female cyclists, and 14 male cyclists) underwent three whole-body DXA scans over a 1-d period: in the morning after an overnight fast, approximately 5 min later after repositioning on the scanning bed, and shortly after a self-chosen exercise session (resistance training or cycling). Subjects were allowed to consume food and fluid ad libitum before and during exercise as per their usual practices. Magnitude of typical (standard) errors of measurement and changes in the mean of DXA measures were assessed by standardization. Results: Exercise and its related practices of fluid and food intake are associated with changes in the mean estimates of total and regional body composition that range from trivial to small but substantial. An exercise session also increases the typical error of measurement of these characteristics by approximately 10%. Conclusion: The easiest and most practical way to minimize the biological "noise" associated with undertaking a DXA scan is to have subjects fasted and rested before measurement. Until sufficient data on the smallest important effect are available, both biological and technical "noises" should be minimized so that any small but potentially "real" changes can be confidently detected.
Details
- Title
- Effects of Exercise Sessions on DXA Measurements of Body Composition in Active People
- Authors
- A Nana (Author) - RMIT UniversityGary J Slater (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringW G Hopkins (Author) - Auckland University of Technology, New ZealandL M Burke (Author) - Australian Institute of Sport
- Publication details
- Medicine and Science in Sports and Exercise, Vol.45(1), pp.148-185
- Publisher
- Lippincott Williams & Wilkins
- Date published
- 2013
- DOI
- 10.1249/MSS.0b013e31826c9cfd
- ISSN
- 0195-9131
- PMID
- 22895377
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health - Nutrition & Dietetics; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99450291702621
- Output Type
- Journal article
Metrics
7 File views/ downloads
751 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Sport Sciences
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites