Inclusion Criteria:  Spinal cord injury due to trauma located at or above the tenth thoracic vertebrae (T10) American Spinal Injury Association grading scale of A-D (2 from each) below the level of SCI Intact spinal reflexes below the level of SCI At least 1-year post-SCI At least 22 years of age Willing to use medically acceptable methods of contraception, if female and of child-bearing potential  Exclusion Criteria:  Currently a prison inmate, or awaiting trial, related to criminal activity Pregnancy at the time of enrollment DEXA t score <-3.5 at spine and femur head History of chronic and/or treatment resistant urinary tract infection Unhealed decubitus ulcer Unhealed skeletal fracture Untreated clinical diagnosis of depression Undergoing, or planning to undergo, diathermy treatment Active participation in another interventional clinical trial Presence of conditions or disorders which require MRI monitoring A history of coagulopathy or other significant cardiac or medical risk factors for surgery Current use of a ventilator Clinically diagnosed cardiopulmonary complications such as chronic obstructive pulmonary disease, cardiac failure, or heart arrhythmia that contraindicate changes in body position such as supine-to-sit-to-stand activities, prolonged standing, or stepping Mass > 113 kg (250 pounds) History of frequent hypotension characterized by light headedness, or loss of consciousness History of frequent hypertension characterized by headache, or bradycardia History of frequent, severe, autonomic dysreflexia Any illness or condition which, based on the research team's assessment, will compromise with the patient's ability to comply with the protocol, patient safety, or the validity of the data collected during this study.