SCI Acute Intermittent Hypoxia and Non-Invasive Spinal Stimulation Combined With Gait Training

Inclusion Criteria: * Participants have been diagnosed with a spinal cord injury below level C2 * ASIA Impairment Scale Grade A-D * Participants are 18 years of age or older * Participants are at least 6 months post spinal cord injury * Participants with paraplegia or tetraplegia secondary to a single spinal cord injury * Participants are able to provide informed consent * Participants are not currently receiving regular physical therapy services Exclusion Criteria: * Individuals less than 18 years of age * Individuals less than 6 months post spinal cord injury * Individuals with ataxia * Individuals with multiple spinal cord injury history * Pregnancy or nursing * Pacemaker or anti-spasticity implantable pumps * Active pressure sores * Unhealed bone fractures * Peripheral neuropathies * Painful musculoskeletal dysfunction due to active injuries or infections * Severe contractures in the lower extremities * Active urinary tract infection * Clinically significant depression, psychiatric disorders, or ongoing drug abuse * Diagnosed with any of the following medical conditions: congestive heart failure, cardiac arrhythmias, uncontrolled hypertension, uncontrolled diabetes mellitus, chronic obstructive pulmonary disease, emphysema, severe asthma, previous myocardial infraction, or known carotid/intracerebral artery stenosis * Individuals with a tracheostomy or who utilize mechanical ventilation. * Individuals who are currently enrolled in another interventional research study …