Table. Summary of Normal and Abnormal Vital Sign Responses to Physical Activity Post–COVID-19.

Normal Response to Activity	Abnormal Response to Activity16
• HR, RR, and systolic BP should rise steadily with exertion • O2 sat should remain above 90% • Diastolic BP should remain constant with exertion	• HR, RR, and systolic BP increasing rapidly with lower levels of exertion due to severe deconditioning • BP should not exceed 180/110 at rest or 210/110 during exercise17 • O2 sat below 90% • Orthostatic hypotension—Drop in BP with positional change • Exertional hypotension—Drop in BP during exertion

Abbreviations: BP, blood pressure; HR, heart rate; O₂ sat, oxygen saturation; RR, respiratory rate.