Leong Hio Teng, Tsui Sammi Sin Mei, Ng Gabriel Yin-Fat, Fu Siu Ngor
Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region.
Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong Special Administrative Region.
J Sci Med Sport. 2016 Dec;19(12):970-974. doi: 10.1016/j.jsams.2016.03.011. Epub 2016 Apr 6.
To compare the reduction of subacromial space (SAS) during arm abduction between overhead athletes with and without rotator cuff (RC) tendinopathy, and to explore the relationship between the strength of scapular muscles with the SAS.
Cross-sectional study.
Sixty-six athletes (33 healthy and 33 with RC tendinopathy, mean age=22.3 years) participated in the study. Ultrasound measurement of the SAS with arm at 0°, 30° and 60° of shoulder abduction were taken, and the maximal isometric force in upper, middle and lower trapezius, and serratus anterior with manual muscle tests (MMT) were assessed using a handheld dynamometer. The change in SAS during arm abduction from 0° to 30° (SAS), 30° to 60° (SAS) and 0° to 60° (SAS) was compared between groups. Differences in force produced with scapular muscles MMT between groups and relationships with reduction in SAS were explored.
We found more reduction of the SAS during SAS in athletes with RC tendinopathy (0.44±1.22mm) than healthy athletes (-0.06±1.41mm) (p=0.045). Athletes with RC tendinopathy demonstrated significant decrease in all scapular muscles MMT strength when compared to their healthy counterparts (p<0.05). In healthy athletes, a lower middle and lower trapezius MMT strength were moderately associated with a greater reduction in SAS during 0° to 30° (r=-0.445, p=0.016 and r=-0.423, p=0.022, respectively) and 0° to 60° of shoulder abduction (r=-0.415, p=0.018 and r=-0.504, p=0.003, respectively).
Athletes with RC tendinopathy demonstrated more reduction in the SAS during early arm abduction. Decreased strength of middle and lower trapezius was related to reduction of the SAS.
比较患有和未患有肩袖（RC）肌腱病的上肢运动员在手臂外展过程中肩峰下间隙（SAS）的减小情况，并探讨肩胛肌力量与SAS之间的关系。
横断面研究。
66名运动员（33名健康运动员和33名患有RC肌腱病的运动员，平均年龄=22.3岁）参与了该研究。在肩部外展0°、30°和60°时，用超声测量SAS，并使用手持测力计通过徒手肌力测试（MMT）评估斜方肌上、中、下肌以及前锯肌的最大等长力量。比较两组在手臂从0°外展到30°（SAS）、30°外展到60°（SAS）以及0°外展到60°（SAS）过程中SAS的变化。探讨两组之间肩胛肌MMT产生的力量差异以及与SAS减小的关系。
我们发现患有RC肌腱病的运动员在SAS期间SAS的减小幅度（0.44±1.22mm）比健康运动员（-0.06±1.41mm）更大（p=0.045）。与健康运动员相比，患有RC肌腱病的运动员所有肩胛肌MMT力量均显著降低（p<0.05）。在健康运动员中，较低的斜方肌中、下肌MMT力量与0°到30°（r=-0.445，p=0.016和r=-0.423，p=0.022）以及0°到60°肩部外展过程中更大的SAS减小幅度呈中度相关（分别为r=-0.415，p=0.018和r=-0.504，p=0.003）。
患有RC肌腱病的运动员在手臂早期外展过程中SAS减小幅度更大。斜方肌中、下肌力量降低与SAS减小有关。
