Relentless Forward Progress: A Guide to Running Ultramarathons

Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond

Koerner Hal

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Born to Run: The hidden tribe, the ultra-runners, and the greatest race the world has never seen

Christopher McDougall

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Training Essentials for Ultrarunning

Koop Jason

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Born to Run

Christopher McDougall • 3 highlights

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