Acute intermittent hypoxia (AIH) involves short (\~1-2min) bouts of breathing low oxygen air to stimulate spinal neuroplasticity. Studies in rodents and humans indicate that AIH improves motor function after spinal cord injury (SCI). This study will use a double blind, cross-over design to test if the combination of AIH and respiratory strength training improves breathing function more than either approach alone in adults with chronic SCI.
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Change in maximal inspiratory pressure
Timeframe: Baseline, Day 1, Day 6, Day 8, Day 15
Change in maximal expiratory pressure
Timeframe: Baseline, Day 1, Day 6, Day 8, Day 15