Don't wear mask WHEN exercising, says WHO

When and how to use masks

Mask mandates return at some US hospitals as COVID, flu jump

Tips for wearing a mask while exercising - Mayo Clinic Health System

Must-know! Exercising with a face mask

The Best Mask for Running and Working Out: How 5 Serious Athletes Are Handling the Coronavirus Mask Dilemma

When and how to use masks

Vermont Department of Health - People who don't have any symptoms can still spread COVID-19. Help protect your family and friends - bring a mask when leaving your house and stay 6

Exercised over nothing: Masks don't impair lung function during physical activity

When and how to use masks

Republicans, Democrats differ on why masks are a downside of COVID-19

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

Best Face Mask for Exercise - CNET

Should you wear a mask while exercising outside?

COMMENTARY: Masks-for-all for COVID-19 not based on sound data

Opinion Should I keep masking if my husband won't? A special Q&A edition. - The Washington Post