Improving Bladder Function in SCI by Neuromodulation

Inclusion Criteria: 1. Male 18-45 years; 2. At least 1 year post-injury; 3. Non-progressive SCI at C2-T8 (non-conus injury); 4. Motor Complete ASIA (A or B); 5. Neurogenic bladder requiring clean intermittent straight catheterization; 6. Able to attend twice weekly testing sessions for 6 months. 7. Have intact lower extremity anatomy and able to use lower extremity for assistive standing and stepping. Exclusion Criteria: 1. History of autonomic dysreflexia; 2. Ventilator dependency; 3. Musculoskeletal dysfunction, unhealed fracture, pressure ulcer, active infection; 4. Clinically significant depression or ongoing drug abuse; 5. Received botox injection, or bladder surgery (suprapubic access, Brindley procedure, etc.); 6. Prostatic hypertrophy or bladder outlet disorder; 7\. Cardiopulmonary disease that precludes lower extremity training or rehabilitation.