Distance runner Ashley Paulson of St. George has set a world record in the 100-mile ultramarathon. Friday night, the ...

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

The marathon aims to attract world-class runners to the trails of Aroostook County and put the region on an international stage.

By Dennis Thompson HealthDay ReporterTHURSDAY, Feb. 19, 2026 (HealthDay News) — Ultra-marathon runners must be incredibly fit to endure races that can extend more than 100 miles, but their bodies pay ...

From muscle fibers to mental grit, here’s the science behind why some bodies can endure ultramarathons, while others hit the wall far sooner. Ultramarathons sit at the far edge of what the human body ...

Runner Stephanie Case completed the 100-kilometer (62 miles) Ultra-Trail Snowdonia ultramarathon in 16 hours and 53 minutes, winning a race that also involves over 21,000 feet of climbing. Adding to ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists have long hypothesized about a theoretical limit to human energy use. Yet elite endurance athletes are constantly ...

Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red ...

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

Pushing the body towards ultra-marathon distances can cause red blood cells to be less flexible, potentially impacting their ability to deliver oxygen and remove waste throughout the body, a new study ...

We bet you didn't expect ramen and Cheetos to make the list.