Effect of Various Movements on Shoulder External Rotators
10.3969/j.issn.1006-9771.2019.01.015
- VernacularTitle:特定肩关节康复运动对肩外旋肌的激活效应
- Author:
Di YANG
1
;
Chi ZHANG
;
Peng-Peng FENG
;
Yang WANG
;
Ying WU
;
Xiang-Yue SI
;
Shuo WANG
;
Jing-Hua QIAN
Author Information
1. 北京体育大学运动医学与康复学院
- Keywords:
rotator cuff injury;
infraspinatus;
posterior deltoid;
open kinetic chain exercises;
closed kinetic chain exercises;
surface electromyography
- From:
Chinese Journal of Rehabilitation Theory and Practice
2019;25(1):107-111
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the activities of infraspinatus (IS) and posterior deltoid (PD) under shoulder external rotation at open kinetic chain (OKC) and closed kinetic chain (CKC) exercise with shoulder abduction 0° and 90° to determine the optimal external rotation rehabilitation exercise.Methods From April to June, 2018, 19 healthy adults finished the movement of 0° OKC, 0° CKC, 90° OKC and 90°CKC. The root mean square (RMS) of IS and PD was recorded with surface electromyography (sEMG), then the standardized RMS (RMS％), ratio of IS/PD and onset time of activation were calculated.Results RMS％ of PD was the minimal at 90° CKC, and was less than that of 0° CKC (P ＜ 0.05). IS/PD was the most at90° CKC, and was more than that of 90° OKC (P ＜ 0.05). The onset time of IS was the earliest in 90° CKC, and earlier than that of 90° OKC (P ＜ 0.05) and 0°OKC (P ＜ 0.05). The onset time of PD was the latest in 0° CKC, and latter than that of 90° OKC (P ＜ 0.05).Conclusion 90°CKC activates IS mostly and earliest, which can be used in early rehabilitation for rotator cuff injury.
