Strengthening exercises should include isotonic dumbbell resistance exercises with the supraspinatus, internal rotators, external rotators, prone extension, horizontal abduction, forward flexion to 90°, upright abduction to 90°, shoulder shrugs, rows, push-ups, press-ups, and pull-downs to strengthen the scapular stabilizers. Joint mobilization and neuromuscular reeducation also should be maintained. Upper extremity ergometry exercises, trunk exercises, and general cardiovascular conditioning should be maintained for endurance. Use of modalities may be continued if necessary. Guidelines to advance from this phase are full pain-free ROM and when manual muscle strength testing is 70% of the contralateral side.