STRETCHING VERSUS CONCENTRIC EXERCISE FOR IMPROVING GLENOHUMERAL EXTERNAL ROTATION RANGE OF MOTION IN ASYMPTOMATIC SUBJECTS:A PILOT RANDOMIZED CLINICAL TRIAL
Keywords:
shoulder, external rotation, stretching, concentric exercise, suprascapular nerve.Abstract
Background: previously published studies suggest that range of motion is highly influenced by a musculotendinous component mediated by neural mechanosensitivity. However, there is no published research that has com-pared passive stretching with an active exercise treatment focused on increasing neural tension on the improvement of glenohumeral range of motion. Aim: to evaluate if a concentric external rotation exercise is more effective than passive stretching for improving glenohumeral external rotation range of motion. Material and method: pilot randomized clinical trial. A convenience sample of 19 asymptomatic subjects between 18 and 30 years was recruited from University of Alcalá. Subjects were randomly assigned to one of each treatment (passive stretching or con-centric external rotation exercise) and received 4 sessions in alternating days within 2 weeks. The most shortened side was treated. Data regarding glenohumeral external rotation range of motion at 0 (RE1) and 90 degrees of abduction, and flexion were collected. 3-by-2 mixed-model analysis of variance (ANOVA) were conducted for out-come measures. Results: The mixed ANOVA only revealed a significant time-by-group interaction for RE1, with a significant post-treatment improvement in Favour of stretching group (mean difference, 6.57º; 95% confidence interval, 1.40º to 11.73º). Conclusion: there seems to be no difference between passive stretching and concentric external rotation exercise regarding improvements in glenohumeral range of motion in asymptomatic subjects.
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