Training Essentials for Ultrarunning: How to Train Smarter, Race Faster, and Maximize Your Ultramarathon Performance

[Koop, Jason, Rutberg, Jim] on . *FREE* shipping on qualifying offers. Training Essentials for Ultrarunning: How to Train Smarter, Race

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Training Essentials for Ultrarunning: How to Train Smarter, Race Faster, and Maximize Your Ultramarathon Performance by Jason Koop