Maybe you jog for exercise. Maybe you've run 10Ks or marathons. But you haven't run nearly as far as this Utah man. Despite all odds, Eric Johnson has really gone the distance.

Camille Herron, 42, is one of the world's top ultramarathon runners, having set 12 world records and becoming the youngest woman to reach 100,000 lifetime running miles. But now, the American athlete ...

Learn more about the impact ultramarathon running has on red blood cells and how it may do more harm than good for the body.

Add Yahoo as a preferred source to see more of our stories on Google. 1.It's so much better to run with a friend than to run solo. Last year, my first year running the Burning Man ultramarathon, I ran ...

A study shows ultramarathon running induces oxidative stress and structural damage in red blood cells. Multiomics analyses revealed protein oxidation, copper accumulation, and reduced cell flexibility ...

You thought the UK was cold when it snowed this winter? Consider how Simon Dicks felt running a five-day Swedish ultra in ...

Distance runner Ashley Paulson of St. George has set a world record in the 100-mile ultramarathon. Friday night, the 44-year-old Paulson won the women's division of the Jackpot 100 Mile Ultra National ...