Relentless Forward Progress: A Guide to Running Ultramarathons

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

The Well-Built Triathlete

Matt Dixon

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Endure Smarter Not Harder (Motivation For Current And Aspiring Endurance Challenge Athletes Book 1)

Grant Shymske

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"Become Superhuman" - Official Resource Guide

Ben Greenfield

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How Bad Do You Want It?: Mastering the Psychology of Mind over Muscle

Matt Fitzgerald

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