They’re running themselves ragged — and possibly fast-tracking Father Time. Ultramarathons are surging in popularity, with more than 100,000 North Americans racing beyond 26.2 miles last year, nearly ...

Long-distance trail running and extreme cardio activity led to red blood cell damage, per a new study. Here, doctors explain ...

Extreme heat makes it especially hard for your body to cool down, so you need to be extra careful if you exercise or play sports when it's baking outside. Your brain tries to keep your body within a ...

Why overdoing extreme endurance running might not be good for you - Scientists provide proof that ultramarathon athletes’ red blood cells become less flexible after a long race, potentially reducing t ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Extreme heat makes it especially hard for ...

Extreme heat makes it especially hard for your body to cool down, so you need to be extra careful if you exercise or play sports when it’s baking outside. Your brain tries to keep your body within a ...