Inclusion Criteria:  Unilateral shoulder pain for ≥1 month A diagnosis of SAIS as determined by having 3 or ore positive tests out of: Neer test, Hawkins test, Painful arc, Jobe test, external rotation resistance test. A positive SAT  Exclusion criteria:  Cervical spine involvement as evidenced by reproduction of symptoms with neck movement Massive rotator cuff tear as evidenced by pseudoparalysis Previous history of a fracture or surgery within the involved shoulder.  Limited passive range of motion by ≥50% or more compared with uninvolved side in  2 planes of motion (i.e. flexion, external rotation) A history of shoulder dislocation or subluxation A history of Rheumatoid arthritis, CVA, fibromyalgia Current pregnancy Population with special needs Pending disability claim / litigation procedure associated with shoulder complaint.