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

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

When elite ultrarunners have a need for speed, they turn to coach Jason Koop. Now the sport’s leading coach makes his highly effective ultramarathon training

Ultramarathons don’t leave much room for mistakes. Don’t learn the hard way: get a jump on training for an ultramarathon with Hal Koerner’s Field Guide to

Errata slip inserted between pages 58-59.