4.1 Article

The Effect of Scapular-Retractor Fatigue on External and Internal Rotation in Patients With Internal Impingement

Journal

JOURNAL OF SPORT REHABILITATION
Volume 18, Issue 2, Pages 229-239

Publisher

HUMAN KINETICS PUBL INC
DOI: 10.1123/jsr.18.2.229

Keywords

shoulder; strength; stability

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Context: Scapular strengthening is thought to be an important component of the rehabilitation of patients with internal impingement. Objective: To determine the effect of scapular-retractor-muscle fatigue on internal- and external-rotation-torque production in patients with internal impingement. Design: Case control study. Setting: Outpatient clinic. Participants: 15 patients and 18 healthy subjects. Intervention: A scapular-retractor-fatigue protocol. Main Outcome Measure: Shoulder-rotation-torque production. Results: After the scapular-retractor-fatigue protocol external-rotation strength was reduced in patients (involved 25%, noninvolved 19%; P<.001). Conclusion: Fatigue in the scapular retractors resulted in lower shoulder-rotation-torque production. These findings emphasize the importance of the scapular retractors for proper function of the shoulder rotators with the arm in an abducted position in patients with internal impingement.

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