Effects of Mulligan's Technique in Subjects With Shoulder Impingement Syndrome

Inclusion Criteria: * history of shoulder pain of \>1-week duration, localized at the proximal anterolateral shoulder region consistent to Shoulder Impingement Syndrome (SIS); * at least 1 positive impingement test (Jobe's test, Neer's test, Hawkins-Kennedy's Test) associated with painful range of motion during arm elevation; or pain during external rotation with the arm in 90 degrees of elevation in the coronal plane. Exclusion Criteria: * fibromyalgia (based on self-report),pregnancy, a history of onset of symptoms because of traumatic injury, other histories of shoulder injury, torn tendons, ligamentous laxity based on positive Sulcus test and apprehension test, numbness or tingling in the upper extremity, previous shoulder or neck surgery, systemic illnesses, body mass index \> 28kg/m2, corticosteroid injection 3 months before evaluation, physical therapy 3 months before evaluation.