Mulligan Mobilization Versus PNF Technique in SIS

Inclusion Criteria: 1. Sixty nine Males and females subjects with SIS, age between 20-40 years old and body mass index (BMI) 18-27.9 kg/m2 2. The SIS group will be limited to patients who had history of shoulder pain of \>1-week duration. 3. Pain localized at the proximal anterolateral shoulder region. 4. Patients with subacromial pain syndrome with positive results of 3 of 5 tests: painful arc, pain or weakness with resisted external rotation, Neer test, Hawkins Kennedy test, and Jobe/empty can test. Exclusion Criteria: * Patients will be excluded if they had any of the following conditions: 1. Open wounds, infection, acute injuries, swelling, rheumatoid arthritis, reflex sympathetic syndrome, or adhesive capsulitis. 2. BMI greater than 28 kg/m². 3. History of shoulder girdle fractures and dislocation, shoulder surgery in the last 12 months or full thickness rotator cuff tear. 4. History of systemic or neurological disorder, cervical radiculopathy and subjects who had received physical therapy treatment for their shoulder within the past three months. 5. History of corticosteroid injection in the shoulder region less than 12 weeks previously.