In order to facilitate the translation of study findings into clinical practice, this study uses a pragmatic design, meaning that the study will involve the use of real world clinical settings and practices. Participants will undergo their standard physical therapist directed locomotor training program while receiving transcutaneous spinal cord stimulation (tcSCS) as an additional treatment. The effects of locomotor training alone will be compared to the combination of locomotor training with tcSCS, specifically comparing the effects of these treatments on spasticity and walking function.