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不同的髋关节旋转角度会影响臀中肌力量减弱的受试者在侧卧位等长髋关节外展时髋外展肌的活动。

Different hip rotations influence hip abductor muscles activity during isometric side-lying hip abduction in subjects with gluteus medius weakness.

机构信息

Applied Kinesiology and Ergonomic Technology Laboratory, Department of Physical Therapy, The Graduate School, Yonsei University, South Korea.

Department of Physical Therapy, The Graduate School, Yonsei University, South Korea.

出版信息

J Electromyogr Kinesiol. 2014 Apr;24(2):318-24. doi: 10.1016/j.jelekin.2014.01.008. Epub 2014 Feb 5.

DOI:10.1016/j.jelekin.2014.01.008
PMID:24560168
Abstract

The purpose of this study was to establish the effects of different hip rotations during isometric side-lying hip abduction (SHA) in subjects with gluteus medius (Gmed) weakness by investigating the electromyographic (EMG) amplitude of the Gmed, tensor fasciae latae (TFL) activity, and gluteus maximus (Gmax), and the activity ratio of the Gmed/TFL, Gmax/TFL, and Gmed/Gmax. Nineteen subjects with Gmed weakness were recruited for this study. Subjects performed three isometric hip abductions: frontal SHA with neutral hips (SHA-N), frontal SHA with hip medial rotation (SHA-MR), and frontal SHA with hip lateral rotation (SHA-LR). Surface EMG amplitude was measured to collect the EMG data from the Gmed, TFL, and Gmax. A one-way repeated-measures analysis of variance was used to determine the statistical significance of the Gmed, TFL, and Gmax EMG activity and the Gmed/TFL, Gmax/TFL, and Gmed/Gmax EMG activity ratios. Gmed EMG activity was significantly greater in SHA-MR than in SHA-N. TFL EMG activity was significantly greater in SHA-LR than in SHA-N. The Gmed/TFL and Gmed/Gmax EMG activity ratios were also significantly greater in SHA-MR than in SHA-N or SHA-LR. The results of this study suggest that SHA-MR can be used as an effective method to increase Gmed activation and to decrease TFL activity during SHA exercises.

摘要

本研究旨在通过研究臀中肌（Gmed）、阔筋膜张肌（TFL）和臀大肌（Gmax）的肌电图（EMG）幅度、Gmed/TFL、Gmax/TFL 和 Gmed/Gmax 的活动比率，来确定在臀中肌无力的受试者中，不同髋关节旋转角度对侧卧位等长髋关节外展（SHA）的影响。本研究共招募了 19 名臀中肌无力的受试者。受试者进行了三种等长髋关节外展：中立位髋关节前侧 SHA（SHA-N）、髋关节内旋前侧 SHA（SHA-MR）和髋关节外旋前侧 SHA（SHA-LR）。通过表面肌电图（sEMG）测量来收集 Gmed、TFL 和 Gmax 的 EMG 数据。采用单因素重复测量方差分析来确定 Gmed、TFL 和 Gmax 的 EMG 活动以及 Gmed/TFL、Gmax/TFL 和 Gmed/Gmax 的 EMG 活动比率的统计学意义。与 SHA-N 相比，SHA-MR 时 Gmed 的 EMG 活动显著增加。与 SHA-N 相比，SHA-LR 时 TFL 的 EMG 活动显著增加。与 SHA-N 或 SHA-LR 相比，SHA-MR 时 Gmed/TFL 和 Gmed/Gmax 的 EMG 活动比率也显著增加。本研究结果表明，SHA-MR 可作为一种有效方法，用于增加 SHA 运动中 Gmed 的激活，并减少 TFL 的活动。

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