Additional Study Information: Standing postural control, or the ability to maintain an upright posture, is needed for most daily activities. People with Spinal Cord Injury (SCI) may find it challenging to maintain postural control and therefore, have difficulty moving between positions, such as lying down or sitting up, or reaching for objects that are beyond an arm's distance away. The goal of this study is to test how transcutaneous spinal cord stimulation (electrodes attached to the skin to stimulate the spinal cord) and a device called the Stand Support Trainer affect stability and balance in people with SCI. Your participation in this study will be useful in finding out how new technologies may help improve the lives of people with SCI. You may receive compensation up to $50 in the form of a pay card for participating in the study.