https://www.sciencedaily.com/releases/2021/04/210413194036.htm

Patients with COVID-19 who were consistently inactive during the 2 years preceding the pandemic were more likely to be admitted to hospital, to require intensive care, and to die than were patients who had consistently met physical activity guidelines, the findings show.

As a risk factor for severe disease, physical inactivity was surpassed only by advanced age and a history of organ transplant.