Effect of scapular protraction and retraction on isometric shoulder elevation strength.

Objectives: To examine the effect of scapular protraction (SP) and scapular retraction (SR) on isometric shoulder elevation strength measured in the sagittal plane and to test the hypothesis that strength would be significantly reduced when tested in the SP position relative to the neutral resting scapular position (SN).

Design: Prospective before-after trial.

Setting: Multidisciplinary sports medicine center.