Over the past decade, ultrarunning has gone from a fringe pursuit for distance freaks to a hypercompetitive sport attracting big-time sponsors. But a mysterious training condition is suddenly plaguing its ranks, robbing a generation of top athletes of their talents and forcing victims to wonder: Is it possible to love this sport too much?
In the grueling world of ultrarunning, she's an anomaly: a low-key athlete who thrives on unstructured training, competes by instinct, and crushes men in the sport's most prestigious race
Despite growing popularity, the much-talked-about sport remains on the fringes of the endurance world.
Listen up, newbies! The ‘Born to Run’ star learned some stuff the hard way so you don’t have to
Two friends go on an annual adventure. This year, it’s in New Zealand, and we’ll be there every step of the way.
A new algorithm might be the key to never having a bad race again.
Our drive to raise billions annually is a crazy effective performance enhancer.
Tips for developing a rock-hard core from the two-time Ultra-Trail du Mont-Blanc winner
With warp-speed ascents that include the Matterhorn (1:56) and Denali (9:43), ultrarunner turned alpinist Kilian Jornet Burgada is the king of the endurance world's latest obsession: fastest known times. And now he plans to run up Everest.
Inspired by an infamous assassin's escape from prison, the Barkley Marathons just might be the toughest race on the planet: a 100-mile-long, unsupported slog through the Tennessee backcountry that only 14 people have ever finished. Madison Kahn spoke to three of the event's regulars to get the story behind the Barkley.