Transcutaneous Spinal Cord Stimulation With Robotic Gait Training in Chronic SCI

Inclusion Criteria: 1. Between 6 months to 5 years from the diagnosis of the traumatic SCI and who are not walking independently; 2. Age between 21 to 65 years old; 3. Incomplete spinal cord injury: ASIA Impairment Scale (AIS) Grade: B-D; 4. Spinal cord injury level: T1- L1, or C2-C8; 5. SCI-TCT Score \> 13; 6. Capable of providing an informed consent; 7. Cleared by Neurosurgeons/ Orthopeadic Surgeons for tSCS; 8. Meets prerequisites for Ekso wearable robotic exoskeleton training. Exclusion Criteria: 1. Participant has uncontrolled cardiopulmonary disease or cardiac symptoms as determined by the investigator; 2. Participant has any unstable or significant medical condition that is likely to interfere with study procedures or likely to confound performance and outcomes like uncontrolled neuropathic pain, depression, severe cognitive impairment; 3. Unstable or uncontrolled autonomic dysreflexia; 4. Requires ventilator support; 5. Spasms that limit the ability of the subjects to participate in the study training as determined by the investigator; 6. Skin conditions that limit the application of tSCS electrodes; 7. Active implanted medical devices that may be affected by tSCS; 8. Pregnant, planning to become pregnant or breastfeeding; 9. Concurrent participation in another drug or device trial that may interfere with this study; 10. Participated in wearable exoskeleton training within the last 3 months prior to enrolment. 11. Peripheral nerve injury or significant Lumbar Radiculopathy