Electromyographic study during isometric exercise of the shoulder in head-out water immersion
Electromyographic study during isometric exercise of the shoulder in head-out water immersion
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DOI：
10.1016/s1058-2746(98)90200-2
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发表时间：
1998-09-01
影响因子：
3
通讯作者：
Minami, A
中科院分区：
文献类型：
--
作者：
Fujisawa, H;Suenaga, N;Minami, A
水中运动被用于肩袖撕裂等肩关节损伤后的早期康复计划，但没有文献讨论水中这种康复计划的肌肉活动。本研究的目的是分析8名志愿者在水中和陆地上进行等长运动时的肌电活动。研究了9种等长运动：30 °、60 °和90 °肩关节屈曲和外展，以及3种肩关节旋转位置（最大内旋、外旋和中间位置）。研究了6块肌肉的9个部分：冈上肌、冈下肌、肩胛下肌、胸大肌的2个部分（锁骨和肋骨）、三角肌的3个部分（前、中、后）和背阔肌。对肌电信号进行低通滤波、全波整流并积分5秒。肌电活动定量为最大手动肌肉试验的百分比。结果表明，冈上肌在90度外展时的活动从陆地上的22.3 +/- 15.8显著降低到水中的3.9 +/- 3.3%手动肌肉测试（P <0.01）。其他肌肉活动也明显低于陆地。这些结果为肩袖撕裂等肩关节损伤后的早期康复计划提供了有价值的信息。
Water exercises are used for early rehabilitation programs after shoulder injury such as rotator cuff tear, yet no literature discusses the muscle activity of such rehabilitation programs in water. The purpose of this study was to analyze the electromyographic activity from 8 volunteers during isometric exercises in water and on land Nine isometric exercises were studied: with 30 degrees 60 degrees and 90 degrees shoulder flexion and abduction, and 3 positions of shoulder rotation at 0 degrees abduction (both maximal internal and external rotation and mid-position). Nine parts of 6 muscles were studied: the supraspinatus, infraspinatus, subscapularis, 2 parts of the pectoralis major (clavicular and costal), 3 parts of the deltoid (anterior, middle, and posterior), and the latissimus dorsi. The electromyographic signals were low-pass filtered, full-wave rectified, and integrated for 5 seconds. The electromyographic activity was quantified as a percentage of the maximal manual muscle test. The results showed that supraspinatus activity at 90 degrees abduction significantly decreased from 22.3 +/- 15.8 on land to 3.9 +/- 3.3% manual muscle test in water (P < .01). Other muscle activities in wafer also decreased remarkably compared with those on land. These results provide valuable information for the safety of water exercise for early rehabilitation programs after shoulder injury such as rotator cuff tear.