Psoas and quadratus lumborum muscle asymmetry among elite Australian Football League players

Hides, J., Fan, T., Stanton, W., Stanton, P., McMahon, K. and Wilson, S. (2010) Psoas and quadratus lumborum muscle asymmetry among elite Australian Football League players. British Journal of Sports Medicine, 44 8: 563-567.


Author Hides, J.
Fan, T.
Stanton, W.
Stanton, P.
McMahon, K.
Wilson, S.
Title Psoas and quadratus lumborum muscle asymmetry among elite Australian Football League players
Journal name British Journal of Sports Medicine   Check publisher's open access policy
ISSN 0306-3674
1473-0480
Publication date 2010-06
Year available 2008
Sub-type Article (original research)
DOI 10.1136/bjsm.2008.048751
Volume 44
Issue 8
Start page 563
End page 567
Total pages 5
Place of publication London, United Kingdom
Publisher BMJ Group
Collection year 2011
Language eng
Subject C1
920201 Allied Health Therapies (excl. Mental Health Services)
170114 Sport and Exercise Psychology
110603 Motor Control
Formatted abstract Objective In this study, asymmetry relative to the preferred kicking leg was determined if it exists for the psoas and quadratus lumborum muscles among elite Australian Football League (AFL) players.
Design AFL players were assessed at three time points from 2005 to 2007 (start of preseason, end of season and end of preseason training). MRI was used to determine the cross-sectional areas (CSAs) of the psoas and quadratus lumborum muscles at the L4–L5 vertebral level (psoas) and the L3–L4 vertebral level (quadratus lumborum).
Setting MRI was performed in a hospital setting.
Participants 54 professional AFL players were eligible to participate in this study. The number of subjects at each of the three time points was 36 for time 1 (T1 Nov 2005), 31 for time 2 (T2 Aug 2006) and 43 for time 3 (T3 Feb Mar 2007).
Risk factors The repeated measures factor in the analyses was “asymmetry”, defined as “ipsilateral” or “contralateral” to preferred kicking leg. Number of injuries (coded as 0, 1, 2 or more) was also included as a risk factor.
Main outcome measurements The dependent variables were the CSAs of the psoas and quadratus lumborum muscles.
Results At all three time points, the CSA of the psoas muscle was significantly greater ipsilateral to the kicking leg, while the CSA of the quadratus lumborum muscle was significantly greater on the side contralateral to the kicking leg. Asymmetry in muscle size was not related to number of injuries.
Conclusions Asymmetry of the psoas and the quadratus lumborum muscles exists in elite AFL players.
Keyword Magnetic resonance imaging (MRI)
Psoas muscle
Australian Football League (AFL)
Quadratus lumborum muscle
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 18 September 2008

 
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