Humerus and Rotator Cuff

Some horizontal abduction problems involve the scapula-humerus relationship rather than insufficient scapular motion alone. People with this scapula-humerus relationship issue often show external rotation limitations. Humeral or rotator cuff issues may require attention if rib cage mechanics, horizontal abduction, and upward rotation are restored but abduction remains poor. Basic cuff work, stabilization drills, and progressive strengthening may be appropriate for remaining humeral or cuff issues. Reach-across activities can improve posterior expansion and help normalize the scapula-humerus relationship.