Scaling strength and power for body mass differences in rugby union players

Crewther, B. T., Kilduff, L. P., Cook, C. J., Cunningham, D. J., Bunce, P. J., Bracken, R. M. and Gaviglio, C. M. (2012) Scaling strength and power for body mass differences in rugby union players. Journal of Sports Medicine and Physical Fitness, 52 1: 27-32.

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Name Description MIMEType Size Downloads
Author Crewther, B. T.
Kilduff, L. P.
Cook, C. J.
Cunningham, D. J.
Bunce, P. J.
Bracken, R. M.
Gaviglio, C. M.
Title Scaling strength and power for body mass differences in rugby union players
Journal name Journal of Sports Medicine and Physical Fitness   Check publisher's open access policy
ISSN 0022-4707
1827-1928
Publication date 2012-02-01
Sub-type Article (original research)
Volume 52
Issue 1
Start page 27
End page 32
Total pages 6
Place of publication Turin, Italy
Publisher Edizioni Minerva Medica
Collection year 2013
Language eng
Formatted abstract
Aim: This study on professional rugby union players was undertaken to: 1) confirm a relationship between body mass (BM) and peak force (PF) and peak power (PP); 2) evaluate the effect of ratio and allometric scaling on these relationships; and 3) compare the PF and PP abilities of different positional groups with each approach.
Methods: Seventy-nine rugby players were assessed for PF during an isometric mid-thigh pull and/or countermovement jump PP. Athlete performance was normalized for BM using standard ratio and allometric scaling methods. The performance data from inside backs (IB), outside backs (OB), tight forwards (TF) and loose forwards (LF) were compared before and after scaling for BM.
Results: Significant relationships were identified between BM and the absolute expression of PF (r=0.25) and PP (r=0.44). These relationships improved with the application of ratio scaling (r=-0.53 to -0.57), but were eliminated after allometric scaling with the derived exponents (r=0.00-0.02). No positional group differences in absolute and allometrically scaled PF and PP were seen, but ratio scaled performance favoured the lighter IB and OB over the heavier TF and/or LF (P<0.05).
Conclusions:The PF and PP abilities of professional rugby union players were related to individual BM and these relationships were differentially affected by ratio (enhanced) and allometric (removed) scaling. Ratio scaled performance favoured the lighter backs over the heavier forwards, which could be explained by their specific movement patterns within a game. Comparing positional data in such a manner may help practitioners to better quantify, assess and monitor the position-specific needs of athletes in team sport.
Keyword Football
Athletic performance
Exercise test
Physical Performance
Elite
Ratio
Size
Time
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Human Movement and Nutrition Sciences Publications
 
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