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2009 Publications

The effect of scapular-retractor fatigue on external and internal rotation in patients with internal Tyler TF, Cuoco A, Schachter AK, Thomas GC, McHugh MP. - last modified 2013-05-02 11:16
J Sport Rehabil. 2009 May;18(2):229-39.


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.