Keep your fitness regimen in-house

One of the craziest speed records in ultrarunning takes athletes from the top of the canyon, down to the bottom, and then all the way back up again—twice.

In short, nothing good—and just one bad night can trigger a cascade of scary side effects

Steer clear of takeout, snack foods, and grab-and-go sandwiches

Plus, the training you can do to cure it for good

The sports-nutrition market is confusing, so we created a helpful guide to show you exactly what and when to eat

As an athlete, you're only as good as your diet. Equip your kitchen with tools that make healthy cooking easy and you can elevate your performance, no additional miles required.

Less than two months after winning UTMB, D'Haene ran the 210-mile trail in under three days

Seven adventurers on their favorite legal performance enhancer

Pump up in the convenience of your own home.

Sure, it's old fashioned. But it's also nutritional rocket fuel, and athletes are making it taste great. Here's how.

Running is as low maintenance as it gets—strap on some shoes and go. But there are a few pieces of inexpensive gear that will make your run more enjoyable and help you go farther and faster.

Josh Jespersen took down Colorado’s 14ers in record time—on a splitboard

In a sport plagued by career-ending injuries, somehow Walmsley hasn’t been hurt once during his phenomenal stretch of success

Mastering ground movement—crawling, rolling, and standing—is a vitally important, often overlooked aspect of becoming a well-rounded, injury-free mountain athlete

There's nothing quite like breaking up the workday with a run, but logistics can make it tough to pull off. Here's how to execute flawlessly.

A new device called Halo Sport promises to improve performance by stimulating your mind. We zapped our brains in the name of science to see if it could really make us faster.

If you’re willing to work hard, conquer your fears, and maybe don some superhero spandex, anything is possible

A new generation of natural protein powders build muscle and aid recovery the clean way

Gear to get you back on the horse

Shareable fitness data has been instrumental to the success of Adrian Ballinger and Corey Richards’s push up Everest. Will it change how the mountain is climbed?

Attempting the Hardrock 100 in winter—with avalanche danger, buried trails, no aid stations—is almost unthinkable

A team of four women will attempt to climb up and ski down one of North America’s toughest peaks this spring

Can an unknown long distance runner beat the 35-year-old record for the fastest cross-country traverse?

The ultrarunner has a long history with the land surrounding Grand Canyon National Park. Now he's pushing to grant it official protections.