Sublime

Consider your food your medicine, which in a way it is, and find a way to get it down, because every calorie counts when you’re running an ultra.

Kelly has done standing backflips at a lean 230 pounds. At the same weight, he completed an ultra-marathon with no training runs longer than 5K, courtesy of Brian MacKenzie (page 92). Kelly has also power cleaned 365 pounds, but he has a bum wrist and catches the weight with one arm bent across his chest like a salute.

The primary resource, as you’ll come back to this: Dom’s top go-to resource for the ketogenic diet, including FAQs, meal plans, and more is ketogenic-diet-resource.com.

The real art to dietary restriction, Nutrition 3.0–style, is not picking which evil foods we’re eliminating. Rather, it’s finding the best mix of macronutrients for our patient—coming up with an eating pattern that helps them achieve their goals, in a way that they can sustain. This is a tricky balancing act, and it requires us (once again) to forg

Dr. Phil Maffetone does an exceptional job detailing the negative metabolic consequences of being undisciplined with your aerobic limits, so read The Big Book of Endurance Training and Racing if you are particularly vulnerable or need more support here.

@iamunscared) is the founder of CrossFit Endurance and the author of the New York Times best-selling book Unbreakable Runner.