Inclusion Criteria of Patients with Shoulder Pain:  Ages ranges from 20-40 years old At least one year of experience of sport climbing Sport Climbing frequency ≥ 6 hours per week in the last one month Shoulder pain ≥ 1 month Minimum of 3/10 on the numerical rating scale (NRS) in the last one month  Inclusion Criteria of Healthy Subjects in the control group:  Ages ranges from 20-40 years old Gender, age, dominant hand and experience matching to shoulder pain climbers group At least one year of experience of sport climbing Sport Climbing at least 6 hours per week in the last one month No history of shoulder pain in the last six months  Exclusion Criteria of Patients with Shoulder Pain and All Healthy Subjects  History of upper limb surgery or fracture History of shoulder dislocation History of neck pain, back pain, or elbow injuries in the last one year Wrist or finger pain during sport climbing > 3/10 on the numerical rating scale (NRS) Shoulder pain during pull-up > shoulder pain during sport climbing Intensive exercise within 12 hours or any delay onset muscle soreness Systemic autoimmune disease Cancer Pregnancy