Running is good for your health, but pushing it too far can take a hidden toll. New research shows that ultramarathons may ...

Extreme runners may have a higher risk of precancerous colon lesions, according to a study that's recently drawn attention thanks to social media chatter and a New York Times article. At the recent ...

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 ...