Anthropometry profiles of elite rugby players: quantifying changes in lean mass

Duthie, GM, Pyne, DB, Hopkins, WG, Livingstone, S and Hooper, SL (2006) Anthropometry profiles of elite rugby players: quantifying changes in lean mass. British Journal of Sports Medicine, 40 3: 202-207. doi:10.1136/bjsm.2005.019695


Author Duthie, GM
Pyne, DB
Hopkins, WG
Livingstone, S
Hooper, SL
Title Anthropometry profiles of elite rugby players: quantifying changes in lean mass
Journal name British Journal of Sports Medicine   Check publisher's open access policy
ISSN 0306-3674
Publication date 2006
Sub-type Article (original research)
DOI 10.1136/bjsm.2005.019695
Volume 40
Issue 3
Start page 202
End page 207
Total pages 6
Editor P. McCrory
J. O'Flaherty
Place of publication London
Publisher B M J Publishing Group
Collection year 2006
Language eng
Subject C1
321401 Exercise Physiology
750203 Organised sports
Abstract Objective: To demonstrate the utility of a practical measure of lean mass for monitoring changes in the body composition of athletes. Methods: Between 1999 and 2003 body mass and sum of seven skinfolds were recorded for 40 forwards and 32 backs from one Super 12 rugby union franchise. Players were assessed on 13 (7) occasions ( mean (SD)) over 1.9 (1.3) years. Mixed modelling of log transformed variables provided a lean mass index (LMI) of the form mass/skinfolds(x), for monitoring changes in mass controlled for changes in skinfold thickness. Mean effects of phase of season and time in programme were modelled as percentage changes. Effects were standardised for interpretation of magnitudes. Results: The exponent x was 0.13 for forwards and 0.14 for backs ( 90% confidence limits +/- 0.03). The forwards had a small decrease in skinfolds ( 5.3%, 90% confidence limits +/- 2.2%) between preseason and competition phases, and a small increase ( 7.8%, 90% confidence limits +/- 3.1%) during the club season. A small decrease in LMI (similar to 1.5%) occurred after one year in the programme for forwards and backs, whereas increases in skinfolds for forwards became substantial (4.3%, 90% confidence limits +/- 2.2%) after three years. Individual variation in body composition was small within a season (within subject SD: body mass, 1.6%; skinfolds, 6.8%; LMI, 1.1%) and somewhat greater for body mass (2.1%) and LMI (1.7%) between seasons. Conclusions: Despite a lack of substantial mean changes, there was substantial individual variation in lean mass within and between seasons. An index of lean mass based
Keyword Sport Sciences
Performance
Physique
Union
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2007 Higher Education Research Data Collection
School of Human Movement Studies Publications
 
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