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

REmotely Monitored, Mhealth (REMM) supported High Intensity Interval Training (HIIT) The intervention consists of high intensity interval training, consisting of a 30-minute exercise session that includes 10 x 1-minute intervals of high intensity 3x/week (e.g., Monday, Wednesday, Friday) and supplemented with 2 sessions per week of strength, balance, and mobility exercises (e.g., Tuesday, Thursday). Exercise will be supported by an activity tracker, which will allow study personnel to track patient heart rates during exercise on a daily basis, allowing them to provide individualized feedback and coaching.

Patients randomized to the control arm will receive the same technology platform and education on exercise options, including HIIT, but will return home to exercise as they see fit without personalized instruction and coaching. They will be remotely monitored, but will not receive feedback unless any adverse events are noted