Writing from both the cutting edge of scientific discovery and the front-lines of elite athletic performance, National Magazine Award-winning science journalist Alex Hutchinson presents a revolutionary account of the dynamic and controversial new science of endurance.

Every year, roughly 2 million people participate in marathons and half marathons in the United States, and, no matter what level they are, every one of these runners has likely hit “The Wall,” running out of muscle fuel in the final miles and slowing down precipitously. In The New Rules, renowned fitness journalist and training coach Matt Fitzgerald cuts through the myths, distilling the most up-to date science to help runners overcome the universally experienced nutritional barriers that prevent success in the marathon and half marathon.

New York Times best-selling author and ultramarathoning legend Dean Karnazes has pushed his body and mind to inconceivable limits, from running in the shoe-melting heat of Death Valley to the lung-freezing cold of the South Pole. He’s raced and competed across the globe and once ran 50 marathons, in 50 states, in 50 consecutive days.

This revolutionary training method has been embraced by elite runners - with extraordinary results - and now you can do it, too. Respected running and fitness expert Matt Fitzgerald explains how the 80/20 running program - in which you do 80 percent of runs at a lower intensity and just 20 percent at a higher intensity - is the best change runners of all abilities can make to improve their performance.

In Eat and Run, Scott Jurek opens up about his life and career - as an elite athlete and a vegan - and inspires runners at every level. From his Midwestern childhood hunting, fishing, and cooking for his meat-and-potatoes family, to his early beginnings in running (he hated it), to his slow transition to ultrarunning and veganism, to his world-spanning, record-breaking races, Scott's story shows the power of an iron will and blows apart all the stereotypes of what athletes should eat to fuel optimal performance.