RecruitingDevice studyTesting Non-Invasive Spinal Stimulation DevicesThe purpose of this study is to compare updated spinal stimulation devices with the spinal stimulation device that is currently used. Spinal stimulation is often used in studies aimed at assisting individuals with a spinal cord injury. These devices were updated to improve upon limitations in the currently used device. The devices will be compared in a group of people without spinal cord injury or other nervous system conditions.