Overview

The goal of this study is to determine whether administration of sildenafil will decrease urine leakage in patients with spinal cord injuries.

Eligibility

General inclusion criteria

1. Between 18 and 45 years of age
2. Able to perform physical activity with their shoulder (moderate arm exercise for 15 min, such as tennis or housework)

General exclusion criteria

1. Shoulder fracture
2. Frozen shoulder (\>50% restriction in shoulder range of motion)
3. Shoulder surgery
4. Full rotator-cuff tears
5. Bilateral shoulder pain
6. Shoulder instability (history or positive apprehension test)
7. Corticosteroid injection in the last 6 weeks
8. Neurological diseases
9. Cardiological diseases
10. Systemic diseases (rheumatic diseases, autoimmune diseases)
11. Uncontrolled diabetes
12. Pregnancy

Group-specific inclusion criteria

1. Shoulder pain group: report unilateral shoulder pain with an average shoulder pain score of≥ 3 in the last week.
2. Control group: report no shoulder pain within 6 months.