Inclusion Criteria:  Have impingement symptoms in clinical tests (Neer impingement test, Hawkin sign, Jobe supraspinatus test) for the last 1 to 6 months with the unilateral shoulder. Have shoulder pain for at least 1 month.  Exclusion Criteria:  Diagnosed any shoulder pathology other than SIS. Have chronic systemic diseases or infections. History of surgery, malignancy, brachial plexus lesion, peripheral neuropaty, humerus fracture, traumatic onset, the existence of massive rotator cuff tears, long head of biceps tendon tears, degenerative and inflammatory joint disorders at the shoulder complex. Receiving steroid injections and therapeutic approaches for SIS during the last six months before the study.