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

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

Running 170 kilometres over mountainous terrain caused people's red blood cells to accumulate more age-related damage than those of less ambitious athletes ...

His fitness levels match those of healthy men in their 20s.

A marathon is a big challenge, no doubt, but once you’ve done one, or even several, where do you go next? How about running even further and earning the title of ultrarunner? This booming format is ...

For the Bull to Bell run, Chiu's toughest stretch was the roughly 30-mile trek along Route 1 in New Jersey from New Brunswick ...

A marathon isn't enough anymore. Around one million people took part in the 42.1 kilometre distance in 2018 but ultramarathons are of running’s fastest growing fashions: participation is up more than ...

Stephanie Case won an ultramarathon race in Wales, running more than 60 miles over rough terrain — and stopping three times to breastfeed her 6-month-old baby, Pepper. In the sport of ultrarunning, ...

Eighty-year-old Bob Becker became the oldest person ever to complete the grueling Badwater 135 ultramarathon, starting in Death Valley's sweltering heat and covering three mountain ranges. The world's ...

The lawyer won the Ultra-Trail Snowdonia’s 100K in Wales last weekend Stephanie Case/Instagram Stephanie Case was breastfeeding her 6-month-old daughter when she won a 100 kilometer ultramarathon last ...

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