Journal article
Longitudinal Changes in Body Composition Assessed Using DXA and Surface Anthropometry Show Good Agreement in Elite Rugby Union Athletes
International Journal of Sport Nutrition and Exercise Metabolism, Vol.29(1), pp.24-31
2019
PMID: 29757050
Abstract
Rugby union athletes have divergent body composition based on the demands of their on-field playing position and ethnicity. With an established association between physique traits and positional requirements, body composition assessment is routinely undertaken. Surface anthropometry and dual-energy X-ray absorptiometry (DXA) are the most common assessment techniques utilised, often undertaken synchronously. This study aims to investigate the association between DXA and surface anthropometry when assessing longitudinal changes in fat free mass (FFM) and fat mass (FM) in rugby union athletes. Thirty-nine elite male rugby union athletes (age 25.7±3.1 years; stature 187.6±7.7 cm; mass 104.1±12.2 kg) underwent assessment via DXA and surface anthropometry multiple times over three consecutive international seasons. Changes in the lean mass index (LMI), an empirical measure to assess proportional variation in FFM, showed large agreement with changes in DXA FFM (r=0.54, SEE=1.5%, P<0.001); the strength of association stronger amongst forwards (r=0.63) compared with backs (r=0.38). Changes in the sum of 7 skinfolds (S7SF) showed very large agreement with changes in DXA FM (r=0.73, SEE=5.8%, P<0.001), with meaningful differences observed regardless of ethnicity (Caucasians r=0.75; Polynesians r=0.62). The LMI and S7SF were able to predict the direction of change in FFM and FM, respectively, 86% and 91% of the time when DXA change was >1kg. Surface anthropometry measures provide a robust indication of the direction of change in FFM and FM, although caution may need to be applied when interpreting magnitude of change, particularly with FM.
Details
- Title
- Longitudinal Changes in Body Composition Assessed Using DXA and Surface Anthropometry Show Good Agreement in Elite Rugby Union Athletes
- Authors
- Adam J Zemski (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringShelley E Keating (Author) - University of QueenslandElizabeth M Broad (Author) - US Paralympics, United StatesGary J Slater (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
- Publication details
- International Journal of Sport Nutrition and Exercise Metabolism, Vol.29(1), pp.24-31
- Publisher
- Human Kinetics
- Date published
- 2019
- DOI
- 10.1123/ijsnem.2018-0019
- ISSN
- 1526-484X
- PMID
- 29757050
- Copyright note
- Copyright © 2019 The Author. This manuscript is as accepted for publication in the International Journal of Sport Nutrition & Excersie Metabolism, Vol 29, No. 1. The definitive version is available at: http://dx.doi.org/10.1123/ijsnem.2018-0019
- 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
- 99450770602621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Nutrition & Dietetics
- Sport Sciences