首页> 美国卫生研究院文献>Journal of Physical Therapy Science >Differences in Muscle Activities of the Infraspinatus and Posterior Deltoidduring Shoulder External Rotation in Open Kinetic Chain and Closed Kinetic ChainExercises
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Differences in Muscle Activities of the Infraspinatus and Posterior Deltoidduring Shoulder External Rotation in Open Kinetic Chain and Closed Kinetic ChainExercises

机译:颈下肌和后三角肌的肌肉活动差异动力学链和闭合动力学链在肩部外旋中的运动练习题

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摘要

[Purpose] This study investigated the changes in electromyographic (EMG) activities of the infraspinatus and posterior deltoid muscles during shoulder external rotation under open kinetic chain (OKC) and closed kinetic chain (CKC) exercise conditions. [Subjects] In total, 15 healthy males participated in this study. [Methods] Subjects performed shoulder external rotations under CKC and OKC conditions while standing with and without weight support provided by a height-adjustable table. Pressure biofeedback was used to ensure a constant amount of weight support. The activities of the infraspinatus and posterior deltoid muscles during shoulder external rotation were measured using a wireless surface EMG system. The paired t-test was used to compare the EMG activities of the infraspinatus and the posterior deltoid muscles and the ratio of the infraspinatus to the posterior deltoid during shoulder external rotation under OKC and CKC conditions. [Results] The EMG activity of the infraspinatus and the ratio of the infraspinatus to the posterior deltoid activities were significantly increased, whereas the posterior deltoid activity was significantly decreased under the CKC condition compared to the OKC condition. [Conclusion] Clinicians should consider the CKC shoulder external rotation exercise when they wish to selectively strengthen the infraspinatus.
机译:[目的]研究开放式运动链(OKC)和闭合式运动链(CKC)运动条件下肩外旋转过程中腓骨下肌和后三角肌的肌电图(EMG)活性的变化。 [对象]共有15名健康男性参加了这项研究。 [方法]在站立和不站立时,受试者在CKC和OKC条件下进行肩部外旋,而高度调节桌不提供重量支撑。使用压力生物反馈以确保恒定的重量支撑。使用无线表面肌电图系统测量肩关节外旋转过程中的下鼻肌和后三角肌的活动。配对t检验用于比较OKC和CKC条件下肩外旋转过程中腓下肌和后三角肌的肌电活动,以及腓下肌与后三角肌的比率。 [结果]与OKC相比,在CKC条件下,虹膜下肌的肌电图活性和肌下肌与后三角肌活动的比率显着增加,而后三角肌活动显着降低。 [结论]当临床医生希望选择性地加强下鼻肌时,应考虑CKC肩外旋运动。

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