To investigate the effect of shoulder exercise using a selected suspension system exercise program on pain, disability, functional performance and proprioception in patients with subacromial impingement syndrome.

Two groups were assigned to this study, the first one received four conventional exercises that designed for shoulder impingement syndrome, the second group received the same four conventional exercises plus four selected suspension system exercises.

The sessions were conducted three times per week fir four weeks.

Inclusion Criteria:

1. Fifty-eight subjects with SIS (more than three months).
2. Their age ranges from 20-45 years old
3. Level of pain (at least 2/10 on VAS)
4. Body mass index (BMI) between 18-25
5. Subjects must show positive results in at least two of the following tests: Neer's impingement test, Hawkins-Kennedy test, supraspinatus (empty can) test, apprehension and relocation test.

Exclusion Criteria:

The subjects will be excluded if they had:

1. Received physiotherapy at last 3 months.
2. Received corticosteroids injection in subacromial space at last 3 months.
3. Received anti-inflammatory medications.
4. Have a fracture or dislocation in shoulder, neck and thoracic regions.
5. Have an acute rotator cuff tear.
6. Have tumor or malignancy in shoulder region.
7. Have neurologic problems in shoulder, neck and thoracic regions.
8. Have cooperation difficulties due to cognitive disorders.