Don't wear mask WHEN exercising, says WHO

Covid deaths are on the rise again, so what happens? Mask-wearing in hospitals is scrapped, George Monbiot

Should You Wear Masks While Exercising During COVID-19? Expert Opinion

CDC urges masks, social distancing after COVID gym outbreaks - Los Angeles Times

12) Face masks don't hinder lung function while exercising, study finds

What are the latest rules for face coverings and masks? - BBC News

Why I won't be wearing a face mask while exercising

CDC Mask Guidelines

How Soon Can You Exercise Again After a Bout of COVID-19?

The surprising effects of mask wearing on fitness • Range Of Motion

New CDC Guidelines Say You Don't Have to Wear a Mask When Running Outdoors — Vivek Cherian M.D.

When and how to use masks

Coronavirus and Face Masks: Experts Share Everything You Need to Know

How NOT to Wear a Mask - The New York Times

Face masks during the COVID-19 pandemic - Wikipedia

You don't need to wear a mask while exercising at the gym: Dr. Etches