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The Heat Tax
A warmer race day can change your finish time even when your fitness, pacing and preparation remain the same. But by how much?

A warmer race day can change your finish time even when your fitness, pacing and preparation remain the same. But by how much?




The science, stories and practices that help amateur runners find the next percent.
This Month
Why do the world's best runners train at altitude? What can we learn?!



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