<p>The sport of running is plagued with injuries that come from long-held beliefs about how to train. In his new book, <em>Unbreakable Runner</em>, CrossFit Endurance founder Brian MacKenzie tears down these traditions to reveal the new rules for fast, powerful running.</p><p>MacKenzie dispels the tenets of run training like high mileage and high-carb diets to show how high-intensity training can make runners strong for races from 5K to ultra marathon. CrossFitters who want to conquer marathon, half-marathon, or even ultra marathon will find effective training guidelines, workouts, and training programs for strong performance in their race distance. Runners interested in trying a new approach to solve injuries will benefit from MacKenzie’s unique blend of run training and whole-body strength and conditioning.</p><p><em>Unbreakable Runner</em> includes CrossFit-based training programs for the most popular running race distances from 5K to ultra marathon.</p>