Patricia McCracken January 30, 2019 Physical Therapy, Shoulder Pain, Steroid Injection One-year outcome of subacromial corticosteroid injection compared with manual physical therapy for the management of the unilateral shoulder impingement syndrome: a pragmatic randomized trial. Patricia McCracken January 30, 2019 Physical Therapy, Shoulder Pain, Steroid Injection Both groups experienced significant improvement. The manual physical therapy group used less 1-year shoulder impingement syndrome-related health care resources than the Corticosteroid injections group.