Daily Intermittent Hypoxia and Task-Specific Upper Limb Training in Persons With Chronic Incomplete SCI

The purpose of this research study is to investigate the effectiveness of a combinatorial therapy of breathing low oxygen in short bursts-acute intermittent hypoxia (AIH) and upper limb training on arm strength and function, and comparing it with individual treatments in persons with spinal cord injuries. The investigators hypothesize that a combinatorial intervention with AIH therapy + upper limb training will be significantly more effective in improving hand function, compared to individual treatments alone. To test this hypothesis, the investigators will determine the impact of combined daily AIH therapy and high-repetition task-specific upper extremity training on arm strength and hand dexterity in persons with spinal cord injuries.