This study will be conducted to compare the effect of neuromuscular training versus traditional strength training in terms of shoulder joint function, proprioception accuracy and isometric external and internal rotator muscles strength in patients with SIS, it will be conducted at the out-patient clinic of physical therapy in Pharos University in Alexandria, Egypt

Double-blinded randomized controlled trial (patient and research assistant (the examiner of all patients) will be blinded).

Participants:

Thirty-four patients of both genders will be selected through non-probability sampling diagnosed as Neer's stage II SIS and their age range from 25-45 years will be randomly assigned to 1 of 2 groups. Each patient will sign an informed consent before starting the study (Appendix III).

Eligible patients will be recruited by physical therapist via referral from the treating orthopedic surgeon who will diagnose SIS based on clinical and radiological examination.

Group I (control): it includes 17 patients who will receive traditional strength training program.

Group II (experimental): it includes 17 patients who will receive upper extremity neuromuscular training exercises

Inclusion Criteria:

• Patient age from 25-40 with a clinical diagnosis of Neer's stage II SIS (Consigliere et al., 2018).

Shoulder pain for at least three months (Heron et al., 2017) Painful arc of movement during flexion or abduction (Heron et al., 2017). Positive Neer's or Kennedy- Hawkins Test (Heron et al., 2017). Pain on resisted external rotation, abduction or Empty Can Test (Ager et al., 2019).

Exclusion Criteria:

Symptoms of cervical radiculopathy. Diagnosed inflammatory disorder. Neurological disorder. Widespread pain condition. Evidence of complete RC tear (positive drop arm test). Previous surgery to the affected shoulder.

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