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首页> 外文期刊>Journal of athletic training >Selective activation of the infraspinatus muscle
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Selective activation of the infraspinatus muscle

机译：鼻下肌的选择性激活

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Context: To improve selective infraspinatus muscle strength and endurance, researchers have recommended selective shoulder external-rotation exercise during rehabilitation or athletic conditioning programs. Although selective strengthening of the infraspinatus muscle is recommended for therapy and training, limited information is available to help clinicians design a selective strengthening program. Objective: To determine the most effective of 4 shoulder external-rotation exercises for selectively stimulating infraspinatus muscle activity while minimizing the use of the middle trapezius and posterior deltoid muscles. Design: Cross-sectional study. Setting: University research laboratory. Patients or Other Participants: A total of 30 healthy participants (24 men, ± women; age = 22.6 ± 1.7 years, height = 176.2 ± 4.5 cm, mass = 65.6 ± 7.4 kg) from a university population. Intervention(s): The participants were instructed to perform 4 exercises: (1) prone horizontal abduction with external rotation (PER), (2) side-lying wiper exercise (SWE), (3) side-lying external rotation (SER), and (4) standing external-rotation exercise (STER). Main Outcome Measure(s): Surface electromyography signals were recorded from the infraspinatus, middle trapezius, and posterior deltoid muscles. Differences among the exercise positions were tested using a 1-way repeated-measures analysis of variance with Bonferroni adjustment. Results: The infraspinatus muscle activity was greater in the SWE (55.98% ± 18.79%) than in the PER (46.14% ± 15.65%), SER (43.38% ± 22.26%), and STER (26.11% ± 15.00%) (F3,87 = 19.97, P .001). Furthermore, the SWE elicited the least amount of activity in the middle trapezius muscle (F3,87 = 20.15, P .001). Posterior deltoid muscle activity was similar in the SWE and SER but less than that measured in the PER and STER (F3,87 = 25.10, P .001). Conclusions: The SWE was superior to the PER, SER, and STER in maximizing infraspinatus activity with the least amount of middle trapezius and posterior deltoid activity. These findings may help clinicians design effective exercise programs.
机译：背景：为了提高选择性鼻下肌的力量和耐力，研究人员建议在康复或运动调节程序中进行选择性肩外旋运动。尽管建议对剑下肌进行选择性强化以进行治疗和训练，但可获得的信息有限，无法帮助临床医生设计选择性强化方案。目的：确定最有效的4种肩部外旋运动，以选择性刺激脊柱下肌活动，同时最大程度地减少斜方肌和后三角肌的使用。设计：横断面研究。地点：大学研究实验室。患者或其他参与者：共有30名健康健康参与者（24名男性，±女性;年龄= 22.6±1.7岁，身高= 176.2±4.5厘米，体重= 65.6±7.4公斤）。干预：指示参与者进行4种锻炼：（1）俯卧外展并外旋（PER），（2）侧卧刮水器锻炼（SWE），（3）侧卧外旋（SER） ，以及（4）站立的外旋运动（STER）。主要观察指标：记录了肌下肌，斜方肌和后三角肌的表面肌电信号。使用Bonferroni调整对方差进行1次重复测量分析，以测试运动位置之间的差异。结果：SWE（55.98％±18.79％）的臀下肌活动大于PER（46.14％±15.65％），SER（43.38％±22.26％）和STER（26.11％±15.00％）（F3） ，87 = 19.97，P <.001）。此外，SWE在斜方肌中部引起的活动最少（F3,87 = 20.15，P <.001）。 SWE和SER中的后三角肌活动相似，但比PER和STER少（F3,87 = 25.10，P <.001）。结论：SWE在最大程度提高鼻下肌活动性方面具有优于PER，SER和STER的优势，其中中斜方肌和后三角肌活动最少。这些发现可能有助于临床医生设计有效的锻炼计划。

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