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

They’re running themselves ragged — and possibly fast-tracking Father Time. Ultramarathons are surging in popularity, with more than 100,000 North Americans racing beyond 26.2 miles last year, nearly ...

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

Ultramarathons might push red blood cells past their limits—accelerating their aging in the process.

Runners are still everywhere, but nowadays, not all of them want to stay on the road — or even on the trail. So, off the beaten path they go, and the distances are climbing to crazy heights as well.

A growing crowd of ultramarathon “runcation-ers” say there’s no way to experience a new place like running—or hiking, or walking or limping—a really, really long way through it. For spectators, some ...

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 ...

Ultramarathons also differ from marathons in that they typically take place on unpaved roads or trails through forests and up and over mountain passes. To better understand why women are attracted to ...

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

In my previous blog I discussed how I rediscovered running when I started to use Nike Free shoes. These alleviated my knee pain and also allowed me to think of my running, not as compulsory drudgery, ...