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We sat down with Dean Karnazes to talk training, food, and more.
The average 5K time for men, plus other key running stats.
Go off road with these seven tips from pro endurance athletes.
Research shows how testosterone affects marathon times.
The same protein that helps you run fast also makes you smarter.
What to eat and drink during a race—from 5K to Ultramarathon.
Michael admits one race challenge weighs heavily on his mind.
Mark is up for pullups but down on sprints.