The record attempt will depend as much on the runners' food and hydration strategies as their speed and stamina

In The Art of Competition, Ironman-turned-author Mark Allen gives insight into the thoughts that helped him race his fastest while living to the fullest.

1,800 CrossFit gyms already offer programs for kids. Should they?

Biking to work? Old news. Running to work may not get you there in the most presentable condition, but it'll sure spice up the morning grind.

When Matthew Inman shared his running motivation with the Internet, the creator of popular webcomic The Oatmeal started a fitness sensation.

A growing number of trail runners are finding a new way to test themselves—without race fees, bibs, or finish line chutes—in search of virgin trail and new course records.

Shane Niemeyer started exercising in prison after hitting rock-bottom. We talked to him about his path to become a regular Ironman competitor who's now gunning for a spot at the World Championships in Kona.

New high-profile brand ambassador, new CEO, new product—now, Nuun has its sights set on hydrating society.

Outside catches up with the author of Diet Cults to parse the culture of nutritional fads, from the (misplaced?) logic behind the Paleo Diet to the emerging sugary sports drink controversy.

It's counterintuitive, but when you're training hard, not eating can lead to piling on the pounds.

Outside and Greenfield chew the fat about locally sourced food—and learning to grow and hunt your own.

Reduced-oxygen training room Air Fit opens in Bay Area

While most new mothers are simply struggling to keep their eyes open all day, Liza Howard, winner of the Umstead 100-mile race, and a select group of athletes come back stronger than ever.

A lucrative long-term sponsorship deal between USA Track & Field and Nike has drawn both ire and enthusiasm from the running community. Is it a corporate takeover—or just what the sport needs?

Can married duo Sami Inkinen and Meredith Loring row across the Pacific without sugar or carbs and stay together?

An ongoing battle over the officiating procedures of USA Track and Field leaves us asking: Who really has the athlete's best interests at heart?

Stop scorning the can. The most nutritious and best tasting foods don't always come from the produce section.

The small women-led team behind Oiselle surprised everyone last year by snagging pro runner Lauren Fleshman. And now they've done it again by stealing away Kara Goucher from Nike. What is it about Oiselle that keeps luring in the top talent?

While most Americans probably can’t even imagine running 200 miles, a contingency of runners is eager to go the extra distance. So what will it take to make the endurance craze stick?

Training hard but still eating like you’re not? You could wind up with hormone deficiencies. The consequences can be dire: low energy, diminished sperm count, and an inability to conceive children.