Autonomic Effects of Stimulation in SCI

This study aims to determine the effects of transcutaneous spinal cord stimulation toincrease blood pressure and use that device to increase exercise power output and heartrate recovery during arm cycle ergometry. In addition, the investigators will see if thestimulation helps regulate body temperature when in a cool environment. Study 1 (armcycle ergometry) will consist of 2 visits that will be between 2‐3 hours in duration,separated by no less than 3 days, and will consist of putting the electrode at theoptimal spot on the spine and completing a submaximal arm ergometry exercise and theother visit will be a sham visit. Study 2 (cool environment) will consist of 2 visitsthat will be between 3‐4 hours in duration, separated by no less than 3 days, and willconsist of assessing core temperature when in a cool environment with the stimulator onand off.