This is an NHS approved study clinical study combining transcutaneous spinal stimulation (SS) with sit-to-stand training following spinal cord injury. In this study we will explore the effects of an 8-week intervention of spinal stimulation sit-to-stand training in people with living with SCI. The main goals of the study to assess changes in sit-to-stand performance, bladder function and health-related quality of life (QoL) in people living with SCI.