Inclusion Criteria:  Chronic (> 1 year since injury), Acquired Upper motor Neuron injury (T10 and above) Discharged from in-patient rehabilitation Moderate to severe trunk control deficit as assessed by the Segmental Assessment of Trunk Control (SATCo, score <16/20) OR unable to fully sit upright while lifting their arms or reaching outside of their base of support while maintaining posture Novice to activity-based locomotor training and transcutaneous spinal stimulation  Exclusion Criteria:  Botox use within the past 3 months Current oral baclofen use and unwillingness or unable to wean under medical guidance Baclofen pump use Musculoskeletal impairment limiting range of motion, unhealed fracture, or other medical complication limiting participation Prior surgery for scoliosis Unwillingness to wean from the use of thoraco-lumbosacral orthosis (TLSO) during study Spina Bifida as etiology of spinal cord injury