Brian MacKenzie, founder of crossfit endurance, ultrarunner and co-author of "Unbreakable Runner, Unleash the Power of Strength & Conditioning for a Lifetime of Running Strong" with T.J. Murphy

joins The Nation to talk about how you can train for lifelong healthy and sustainable running by incorporating crossfit endurance training. The main principles include

Develop correct and efficient running skills
Build running endurance without injury
Build functional strength, conditioning and mobility
Focus on nutrition

Get the book HERE

Brian's other book, " Power Speed ENDURANCE: A Skill-Based Approach to Endurance Training"

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Crush Every Race from 5K to Ultra with Brian MacKenzie