REmotely Monitored, Mobile Health-Supported High Intensity Interval Training After COVID-19 Critical Illness (REMM-HIIT-COVID-19)

Exclusion Criteria

• •1. Not ambulating independently prior to COVID-19 illness (use of a gait aid permitted)
• •2. Functional impairment resulting in inability to exercise at hospital discharge (including need for home oxygen requirement)
• •3. Unable or unwilling to follow coaching via mobile-health iPhone interaction
• •4. Any absolute contraindications to exercise (as outlined in the American Thoracic Society Guidelines for Cardiopulmonary Exercise Testing), including but not limited to:
• •1. Recent (\< 5 days) acute primary cardiac event
• •2. Unstable Angina
• •3. Uncontrolled dysrhythmias causing symptoms or hemodynamic compromise
• •4. Symptomatic aortic stenosis
• •5. Uncontrolled symptomatic heart failure
• •6. Acute myocarditis or pericarditis
• •7. Suspected or known dissecting aneurysm