Shoulder Eccentric External Rotator Training for Subacromial Pain Syndrome

Shoulder External Rotator Eccentric Training for Subacromial Impingement Syndrome

The purpose of this study is to examine the effects of eccentric exercise to the shoulder muscles for people with shoulder pain. Identifying specific exercise protocols for individuals with shoulder pain will provide evidence to help clinicians select the best interventions.

Prior investigations for eccentric training of the shoulder have primarily utilized a pain provocation model for exercise progression. This method of progressing resistance training load and volume assumes that pain must be increased during the exercise movement for clinical benefit to occur. When the individual reports a reduction in pain, load is increased so that the provoking pain level returns. The contrast to this approach would be a performance based progression as utilized in the Blume et al study for shoulder eccentric training. This method progresses a patient based on ability to perform a higher number of repetitions at a given load without increasing symptoms which could be favorable in many clinical settings.

Further investigation on the role of eccentric training, specifically to the shoulder external rotators, in patients with SAPS is warranted. Thus, the aim of this investigation was to compare outcomes, for individuals diagnosed with SAPS, performing a six week protocol of eccentric training to the shoulder external rotators compared to a general exercise protocol.

Inclusion Criteria:

• Presence of non-acute shoulder pain (greater than 3 months duration)
• 3 out of the 6 following tests positive, Neer impingement, Hawkins-Kennedy impingement, empty can test, resisted external rotation test, palpable tenderness at the insertion of the supraspinatus or infraspinatus, and painful arc from 60° to 120° during active abduction.
• Age over 18 years old
• Sufficient ability to read English as required for completing questionnaires

Exclusion Criteria:

• Red flags noted in the patient's Medical Screening Questionnaire (MSQ) (ie. tumor, fracture, metabolic diseases, rheumatoid arthritis, osteoporosis, prolonged history of steroid use)
• Full thickness supraspinatus or infraspinatus tendon tear as determined by a positive drop arm test, lag sign or rent test.
• Shoulder adhesive capsulitis as evidenced by a limitation in passive motion for all shoulder planes of movement.
• Having an upper extremity amputation.
• Individuals having a history of surgery to the cervical spine or involved upper extremity for a musculoskeletal, neurological or dermatological condition for which they are at the time of data collection receiving post-operative care.
• Pending legal action regarding their shoulder pain
• Inability to comply with treatment and follow up schedule
• Insufficient English language skills to complete all questionnaires