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首页> 外文期刊>Journal of athletic training >Serratus Anterior and Lower Trapezius Muscle Activities During Multi-Joint Isotonic Scapular Exercises and Isometric Contractions
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Serratus Anterior and Lower Trapezius Muscle Activities During Multi-Joint Isotonic Scapular Exercises and Isometric Contractions

机译：等距肩S骨运动和等距收缩期间锯齿肌的前斜方肌和下斜方肌活动

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Context: Proper scapular function during humeral elevation, such as upward rotation, external rotation, and posterior tilting of the scapula, is necessary to prevent shoulder injury. However, the appropriate intensity of rehabilitation exercise for the periscapular muscles has yet to be clarified. Objective: To identify the serratus anterior, lower trapezius, infraspinatus, and posterior deltoid muscle activities during 2 free-motion exercises using 3 intensities and to compare these muscle activities with isometric contractions during quadruped shoulder flexion and external rotation and abduction of the glenohumeral joint. Design: Cross-sectional study. Setting: Health Science Laboratory. Patients or Other Participants: A total of 16 uninjured, healthy, active, male college students (age = 19.5 ± 1.2 years, height = 173.1 ± 6.5 cm, weight = 68.8 ± 6.6 kg). Main Outcome Measure(s): Mean electromyographic activity normalized by the maximal voluntary isometric contraction was analyzed across 3 intensities and 5 exercises. Intraclass correlation coefficients were calculated for electromyographic activity of the 4 muscles in each free-motion exercise. Results: Significant interactions in electromyographic activity were observed between intensities and exercises (P < .05). The quadruped shoulder-flexion exercise activated all 4 muscles compared with other exercises. Also, the modified robbery free-motion exercise activated the serratus anterior, lower trapezius, and infraspinatus compared with the lawn-mower free-motion exercise. However, neither exercise showed a difference in posterior deltoid electromyographic activity. Conclusions: Three intensities exposed the nature of the periscapular muscle activities across the different exercises. The free-motion exercise in periscapular muscle rehabilitation may not modify serratus anterior, lower trapezius, and infraspinatus muscle activities unless knee-joint extension is limited.
机译：背景：肱骨抬高过程中适当的肩cap骨功能（例如向上旋转，外部旋转和肩cap骨向后倾斜）对于防止肩部受伤是必要的。但是，肩s骨肌肉的适当的康复运动强度尚待阐明。目的：利用3种强度识别2种自由运动中锯齿状肌的前，下斜方肌，下斜肌和后三角肌活动，并将这些肌肉活动与四肢屈曲，外旋和肱骨关节外展时的等距收缩进行比较。设计：横断面研究。地点：健康科学实验室。患者或其他参与者：共有16名未受伤，健康，活跃的男性大学生（年龄= 19.5±1.2岁，身高= 173.1±6.5厘米，体重= 68.8±6.6公斤）。主要观察指标：在3种强度和5种运动中，通过最大自愿等距收缩标准化的平均肌电图活动进行了分析。计算每次自由运动中4条肌肉的肌电图活动的类内相关系数。结果：在强度和运动之间观察到肌电活动的显着相互作用（P <.05）。与其他运动相比，四足屈膝运动可以激活所有4条肌肉。此外，与割草机自由运动相比，改良的抢劫自由运动可激活锯缘前，下斜方肌和下斜肌。但是，两项运动均未显示后三角肌电活动的差异。结论：三种锻炼强度可以揭示肩exercises周围肌肉活动的本质。除非限制膝关节伸展，否则肩cap周肌康复中的自由运动可能不会改变前锯肌，下斜方肌和鼻下肌的活动。

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