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BACKGROUNDThe glenohumeral joint becomes dislocated more than any other major joint because it maintains a wide range of motion and its stability is inherently weak. The most common complication following acute initial shoulder dislocation is recurrent dislocation or chronic instability. Imbalance of strength and range of motion in individuals with anterior dislocation can be a contributing factor in recurrent dislocation as well.METHODSThis case-control study consisted of 24 individuals with a mean age of 24.29±4.33 years, and a mean dislocation rate of 5.37±3.62 times. Isometric cuff strength was measured using a handheld dynamometer and for range of motion, the Leighton flexometer was used in internal and external rotational motions of both upper extremities. Independent t-test was used for data analysis.RESULTSThe internal and external range of motion of the injured glenohumeral joint was lower than the uninjured joint (P<0.001). Similarly, the internal and external rotation strength of the injured joint was lower than the uninjured joint (P<0.001).CONCLUSIONSAccording to previous data, imbalance of strength and range of motion in individuals with anterior shoulder dislocation can be a contributing factor in long-term disability and increased recurrent dislocation and our finding confirm decreased range of motion and strength in our patients. Hence, proper exercise and rehabilitation plans need to be developed for those suffering from this complication.

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A Comparison of Glenohumeral Internal and External Range of Motion and Rotation Strength in healthy and Individuals with Recurrent Anterior Instability.