Winning the Western States 100 on Saturday evening in 14 hours, 11 minutes, 25 seconds on a notoriously hot day in Auburn, California, will go down as an all-time life achievement for Caleb Olson. But ...

Kilian Jornet placed third at Western States 100 on Saturday evening. The 37-year-old, universally recognized as the greatest trail ultrarunner of all-time, was making a dramatic return to Western ...

As runners, most of us want to improve VO2 max to make hard efforts feel easier and to run faster for longer. And new ...

Kipyegon’s time initially read as 4:06.91, but was later adjusted to 4:06.42. Nike has explained what happened.

Bill Dellinger, Olympic bronze medalist in the 5,000 meters, mentor to the legendary Steve Prefontaine, and for more than 30 ...

Revolutionary new engineering and materials lead to big running economy gains. Hi, Team.

Dane Miklaus, C.S.C.S., founder of WORK Training Studio in Irvine, California, took on the puzzle of creating a tough, ...

Kipyegon shaved 1.22 seconds off her previous best of 4:07.64 (though her time in Paris is not world record eligible). No ...

Once you start your run, you’ll notice that the Aviron Victory Treadmill features a “Cloud Stride” deck with six shock ...

If you notice an ache or irritation crop up during a run, and it lasts more than just one workout or two, or if it goes away but then comes back when you run again, Fijas suggests getting it checked ...

How to do it: Start on all fours with a neutral spine, knees under hips and wrists under shoulders. Keeping back flat, use ...

Here at Runner’s World, we’ll be watching the attempt closely — and you can follow along with us right here.