Inclusion Criteria:  18-65 years of age Self-reported history of COVID-19 diagnosis Self-reported ongoing symptoms of PASC >4 weeks after initial infection  Exclusion Criteria:  Neuromotor, musculoskeletal, or rheumatoid disorders that are exacerbated by exercise or conditions preventing cooperation COVID-19 infection occurring > 6 months prior to screening date Contraindications to Symptom-limited Maximal Exercise Testing Individuals without access to a device with iOS (apple devices such as iPhone, iPad, MacBook, etc.) Patient-reported diagnosis of severe arterial hypertension Patient reported metabolic disease Patient reported uncontrolled asthma Inmates Pregnancy Patient reported supplemental O2 use Presence of beards Patient reported diagnosis of claustrophobia Non-English speaking