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Activation of Selected Shoulder Muscles During Unilateral Wall and Bench Press Tasks Under Submaximal Isometric Effort

机译：等边作用力最大的情况下，单侧壁和卧推任务中选定肩部肌肉的激活

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STUDY DESIGN: Controlled laboratory study. OBJECTIVE: To assess the activation of 7 shoulder muscles under 2 closed kinetic chain (CKC) tasks for the upper extremity using submaximal isometric effort, thus providing relative quantification of muscular isometric effort for these muscles across the CKC exercises, which may be applied to rehabilitation protocols for individuals with shoulder weakness. BACKGROUND: CKC exercises favor joint congruence, reduce shear load, and promote joint dynamic stability. Additionally, knowledge about glenohumeral and periscapular muscle activity elicited during CKC exercises may help clinicians to design protocols for shoulder rehabilitation. METHODS: Using surface electromyography, activation level was measured across 7 shoulder muscles in 20 healthy males, during the performance of a submaximal isometric wall press and bench press. Signals were normalized to the maximal voluntary isometric contraction, and, using paired t tests, data were analyzed between the exercises for each muscle. RESULTS: Compared to the wall press, the bench press elicited higher activity for most muscles, except for the upper trapezius. Levels of activity were usually low but were above 20% maximal voluntary isometric contraction for the serratus anterior on both tasks, and for the long head triceps brachii on the bench press. CONCLUSIONS: Both the bench press and wall press, as performed in this study, led to relatively low EMG activation levels for the muscles measured and may be considered for use in the early phases of rehabilitation. J Ort hop Sports Phys Ther 2011;41(7):520-525, Epub 2 February 2011. doi:10.2519/jospt.2011.3418
机译：研究设计：受控实验室研究。目的：使用最大等腰肌力来评估上肢的2条闭合运动链（CKC）任务下的7个肩部肌肉的激活，从而在整个CKC锻炼中相对定量地评估这些肌肉的等腰肌力，这可用于康复肩部无力人士的治疗方案。背景：CKC练习有利于关节的融合，减少剪切负荷，并提高关节的动态稳定性。此外，在CKC锻炼中引起的盂肱和肩cap周围肌肉活动的知识可能有助于临床医生设计肩关节康复方案。方法：使用表面肌电图，在次最大等距壁压和卧推过程中，测量了20位健康男性的7个肩部肌肉的激活水平。将信号归一化为最大自愿等距收缩，并使用配对的t检验，对每条肌肉进行锻炼之间的数据进行分析。结果：与卧推相比，卧推引起大多数肌肉（上斜方肌除外）具有更高的活动性。两种活动的活动水平通常较低，但对于前侧锯齿肌和卧推器中的长头肱三头肌，其自愿性等轴测最大收缩均在20％以上。结论：这项研究中进行的卧推和卧推都导致所测肌肉的EMG活化水平相对较低，可以考虑在康复的早期阶段使用。 J Ort hop Sports Phys Ther 2011； 41（7）：520-525，Epub 2011年2月2日。doi：10.2519 / jospt.2011.3418

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