Brian MacKenzie Libros

The author, founder of CrossFit Endurance, along with a group of endurance and CrossFit coaches, presents step-by-step illustrated techniques, drills and training strategies to improve physical performance and capacity while decreasing susceptibility to injuries.

The sport of running is founded upon unchallenged beliefs about how to train. Unbreakable Runner tears down these traditions to reveal the new rules for fast, powerful running. The creator of CrossFit Endurance, Brian 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.