ELECTROMYOGRAPHIC AMPLITUDE RATIO OF SERRATUS ANTERIOR AND UPPER TRAPEZIUS MUSCLES DURING MODIFIED PUSH-UPS AND BENCH PRESS EXERCISES
ELECTROMYOGRAPHIC AMPLITUDE RATIO OF SERRATUS ANTERIOR AND UPPER TRAPEZIUS MUSCLES DURING MODIFIED PUSH-UPS AND BENCH PRESS EXERCISES
复制标题
DOI：
10.1519/jsc.0b013e3181660748
复制
发表时间：
2008-03-01
影响因子：
3.2
通讯作者：
Oliveira, Anamaria S.
中科院分区：
文献类型：
--
作者：
Martins, Jaqueline;Tucci, Helga T.;Oliveira, Anamaria S.
肩关节功能障碍患者的前锯肌和上睑肌力偶不平衡和虚弱。人们有兴趣确定选择性激活这些肌肉的练习，并将其纳入康复方案。本研究旨在验证UT/SA肌电图（EMG）振幅比，在不同的上肢运动和两个基地的支持。对12名健康男性进行了测试（平均年龄= 22.8 +/- 3.1岁），并使用单个差分表面电极记录了上睑肌和前锯肌的表面EMG。志愿者在一个稳定的支撑基础上和一个瑞士球上进行等长收缩，进行墙壁俯卧撑（WP）、卧推（BP）和俯卧撑（PU）练习。所有SEMG数据报告为所研究的每块肌肉的三次最大自主收缩之一中获得的最大值的均方根或线性包络积分的百分比。进行线性混合效应模型以比较UT/SA比值。WP、BP和PU练习显示，对于稳定表面，UT/SA比平均值+/- SD分别为0.69 +/- 0.72、0.14 +/- 0.12和0.39 +/- 0.37，而对于不稳定表面，值分别为0.73 +/- 0.67、0.43 +/- 0.39和0.32 +/- 0.30。结果表明，UT/SA比值的影响，由演习和上肢基地的支持。实际应用表明，对于UT/SA力偶不平衡或前锯肌无力的患者，在稳定表面上的BP是前锯肌训练的首选运动，而不是在任一表面上的WP和PU。
Imbalance and weakness of the serratus anterior and upper trapezius force couple have been described in patients with shoulder dysfunction. There is interest in identifying exercises that selectively activate these muscles and including it in rehabilitation protocols. This study aims to verify the UT/SA electromyographic (EMG) amplitude ratio, performed in different upper limb exercises and on two bases of support. Twelve healthy men were tested (average age = 22.8 +/- 3.1 years), and surface EMG was recorded from the upper trapezius and serratus anterior using single differential surface electrodes. Volunteers performed isometric contractions over a stable base of support and on a Swiss ball during the wall push-up (WP), bench press (BP), and push-up (PU) exercises. All SEMG data are reported as a percentage of root mean square or integral of linear envelope from the maximal value obtained in one of three maximal voluntary contractions for each muscle studied. A linear mixed-effect model was performed to compare UT/SA ratio values. The WP, BP, and PU exercises showed UT/SA ratio mean +/- SD values of 0.69 +/- 0.72, 0.14 +/- 0.12, and 0.39 +/- 0.37 for stable surfaces, respectively, whereas for unstable surfaces, the values were 0.73 +/- 0.67, 0.43 +/- 0.39, and 0.32 +/- 0.30. The results demonstrate that UT/SA ratio was influenced by the exercises and by the upper limb base of support. The practical application is to show that BP on a stable surface is the exercise preferred over WP and PU on either surfaces for serratus anterior muscle training in patients with imbalance between the UT/SA force couple or serratus anterior weakness.