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The American Journal of Sports Medicine
Year: 2010  |  Volume: 38  |  Issue: 1  |  Page No.: 114 - 119

Correction of Posterior Shoulder Tightness Is Associated With Symptom Resolution in Patients With Internal Impingement

T. F Tyler, S. J Nicholas, S. J Lee, M Mullaney and M. P. McHugh    

Abstract: Background

Glenohumeral internal rotation deficit (GIRD) and posterior shoulder tightness have been linked to internal impingement.

Purpose

To determine if improvements in GIRD and/or decreased posterior shoulder tightness are associated with a resolution of symptoms.

Study Design

Cohort study; Level of evidence, 3.

Methods

Passive internal rotation and external rotation (ER) range of motion (ROM) at 90° of shoulder abduction and posterior shoulder tightness (cross-chest adduction in side lying) were assessed in 22 patients with internal impingement (11 men, 11 women; age 41 ± 13 years). Treatment involved stretching and mobilization of the posterior shoulder. The Simple Shoulder Test (SST) was administered on initial evaluation and discharge. Changes in GIRD, ER ROM, and posterior shoulder tightness were compared between patients with complete resolution of symptoms versus patients with residual symptoms using independent t tests.

Results

Patients had significant GIRD (35°), loss of ER ROM (23°), and posterior shoulder tightness (35°) on initial evaluation (all P < .01). Physical therapy (7 ± 2 weeks; range, 3–12 weeks) improved GIRD (26° ± 14°; P < .01), ER ROM loss (14° ± 20°), and posterior shoulder tightness (27° ±19°). The SST improved from 5 ± 3 to 11 ± 1 (P < .01). A greater improvement in posterior shoulder tightness was seen in patients with complete resolution of symptoms (n = 12) compared with patients with residual symptoms (35° vs 18°; P < .05). Improvements in GIRD and ER ROM loss were not different between groups (GIRD, 25° vs 28°, P = .57; ER ROM, 14° vs 15°, P = .84).

Conclusion

Resolution of symptoms after physical therapy treatment for internal impingement was related to correction of posterior shoulder tightness but not correction of GIRD.

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