An electrifying look inside the wild world of extreme distance running. Once the reserve of only the most hardcore enthusiasts, ultra running is now a thriving

Welcome to Japan, the most running-obsessed nation on earth, where: a long-distance relay race is the country's biggest annual sporting event; companies sponsor

In one of his most ambitious physical efforts to date, Dean Karnazes attempted to run 50 marathons, in 50 states, in 50 days to raise awareness of youth obesity

An inspirational memoir by Scott Jurek, one of the finest ultrarunners in the world.

It’s no secret that if you plan to run in the toughest endurance races, you need to physically prepare for the extreme demands you will be subjecting your bod