Blood pressure (BP) and heart rate (HR) during orthostatic stress test before (Pre) and after (Post) respiratory training (RT) program. Example from female with C4, AIS A SCI of one-minute means of systolic blood pressure (black), diastolic blood pressure (gray), and heart rate (red) during orthostatic stress test. Before (top) respiratory training, the participant demonstrated a poorly regulated response to orthostatic stress, while after (bottom) respiratory training, the hemodynamic and cardiac responses improved.