Scapular muscle activation during TRX suspension and traditional scapular exercise

• Main Authors: Ping-Tsung Li, 李秉聰
• Other Authors: Po-Hsi Chou
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/42976989801342103556

碩士 === 高雄醫學大學 === 運動醫學系碩士班 === 105 === Background: In clinical, physical therapists meet some problems around shoulder joint, for example, subacromial impingement syndrome, rotator cuff tendinitis, fracture, forward head, thoracic kyphosis. These problems usually create imbalance of muscle around scapula, excess activation of the upper trapezius (UT) combine with hypoactivity of the lower trapezius (LT) and the serratus anterior (SA). Selective activation of the weaker muscles with minimal activity in the hyperactivity muscles is an important component in the reduction of the imbalance. Recent literatures finding reductive exercises are single joint movement, but most activities of daily living are multiple joint movement. Single joint exercises can’t improve functional performance of daily living. Purpose: TRX is a instrument of functional training. It can suspend a part of body and combine functional movement. It is a few literature about scapular muscle activity of functional training with TRX. The purpose of this study is to compare scapular muscle activation during TRX suspension and traditional scapular exercises. Methods: Eighteen healthy (10 man, 8 women) adult subjects in a group participated in this study. Electromyography (EMG) was used to record the activity of scapular muscle, upper trapezius (UT), middle trapezius (MT), lower trapezius (LT) and serratus anterior (SA). Respectively, subjects performed a series of 9 exercises include 4 traditional exercise and 5 TRX exercise. The ratios (UT/MT, IT/LT and UT/SA) during exercises were calculated. Repeated measure two-way ANOVA was used to compare the data between every exercises. Result: For exercise, Y flying was significant high ratio in UT/MT and UT/LT compared with side-lying external rotation, side-lying forward flexion, prone horizontal abduction with external rotation, low roll. For phase, isometric contraction compared with eccentric contraction was significant high ration in UT/SA. For exercise × phase, TRX compared with traditional exercises were significant high ratio in UT/LT. Conclusion: Although Y flying had difference with some exercises, TRX was no significant difference with most traditional exercise. It was difficult to learn TRX exercises in correct movement procedure during a short time. If clinicians selected TRX exercises carefully and instructed patients with correct movement procedure, it were suitable functional training.