 Before and after every experiment and training session, a physical therapist PT or research staff member will examine the research participants skin for irritations and abrasions. If skin irritations or abrasions are caused by the electrodes, harness position or hand placements of trainers, electrode, the harness and hand placement will be modified appropriately. Further, the PT will constantly monitor the research participants skin and muscle for signs of muscle strain, joint sprain and skin irritation e.g. temperature and redness. 