Division of Physiotherapy, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, 4072 Queensland, Australia.
Br J Sports Med. 2010 Jun;44(8):563-7. doi: 10.1136/bjsm.2008.048751. Epub 2008 Sep 18.
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.
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).
MRI was performed in a hospital setting.
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).
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.
The dependent variables were the CSAs of the psoas and quadratus lumborum muscles.
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.
Asymmetry of the psoas and the quadratus lumborum muscles exists in elite AFL players.
本研究旨在确定澳大利亚足球联赛（AFL）精英球员的腰大肌和竖脊肌相对于惯用踢腿侧是否存在不对称性。
2005 年至 2007 年，对 AFL 球员进行了三次评估（ preseason 开始时、赛季结束时和 preseason 训练结束时）。MRI 用于确定 L4-L5 椎体水平（腰大肌）和 L3-L4 椎体水平（竖脊肌）的腰大肌和竖脊肌的横截面积（CSA）。
MRI 在医院环境中进行。
54 名职业 AFL 球员有资格参加本研究。在三个时间点，每个时间点的受试者数量分别为 T1（2005 年 11 月）的 36 名，T2（2006 年 8 月）的 31 名和 T3（2007 年 2-3 月）的 43 名。
分析中的重复测量因素是“不对称性”，定义为“同侧”或“对侧”惯用踢腿侧。受伤次数（编码为 0、1、2 或更多）也被视为危险因素。
因变量为腰大肌和竖脊肌的 CSA。
在所有三个时间点，腰大肌的 CSA 均显著大于踢腿侧的同侧，而竖脊肌的 CSA 则显著大于踢腿侧的对侧。肌肉大小的不对称性与受伤次数无关。
在 AFL 精英球员中存在腰大肌和竖脊肌的不对称性。
