AUTHOR=Kjertakov Metodija TITLE=Commentary: Moderate exercise may prevent the development of severe forms of COVID-19, whereas high-intensity exercise may result in the opposite JOURNAL=Frontiers in Physiology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2022.902739 DOI=10.3389/fphys.2022.902739 ISSN=1664-042X