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 ...

Discover what ultramarathon runners eat to run 100 miles. This ultra runner enjoys avocados and bison bars, and follows a ...

Add Yahoo as a preferred source to see more of our stories on Google. United States ultramarathon runner Courtney Dauwalter runs through the mountains near Twin Lakes, Colorado. Dauwalter sits at the ...

Given the long distance of these competitions, ultra-endurance athletes have to think about food they can carry. There are ...

Correction: A previous version of this article misattributed quotes from Kevin Mathieu and Timothy Sullivan. Sure, vomiting is allowed. Discouraged but allowed, according to the bylaws of this ...

LFTO investigates why so many veteran runners are lining up for ultras, and what effect ageing has on our ability to perform at our best.

Only one runner, Michael Wardian, a 51-year-old from Arlington, Virginia, holds the record for the fastest time accomplishing ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. BUTTE — In 2020, Wes Plate was like many other Americans during COVID who were itching to get out ...

It took about 18 miles for Benny Hickok to realize exactly why the race earned the designation as Indiana’s “toughest trail race.” For starters, the trails guiding racers through the Owen-Putnam State ...

In the sport of ultrarunning, athletes often defy human limits. But at a recent 100-kilometer race in Wales, one runner took it to another level. As seen in photos that quickly went viral, runner — ...