Inclusion Criteria(patients with shoulder pain) :  the patients with shoulder pain from 20 - 60 years old Active arm elevation close to 150 degrees Shoulder pain at least 3 months  Inclusion Criteria (healthy people) :  the people from 20 - 40 years old no any symptoms or injuries on shoulder one year ago  Exclusion Criteria:  Adhesive capsulitis Pathologies of cervical origin History of acute trauma, previous surgery, or fracture in the affected shoulder Corticoid injection in the last 3 months Platelet Rich Plasma injection in the last 1 year Other manual and exercise physical therapy in the last 6 weeks Anyone suffering from neurological diseases and nerve damage Vulnerable subjects