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An ultra-runner summits a mountain peak with the sun low in the sky behind him

An Ultra-Athlete’s Guide to RPE

An athlete’s rate of perceived exertion, or RPE, is one of the most underappreciated metrics. For ultra-athletes who are closely in touch with their bodies and minds, working with RPE is an essential component to training and racing.

Illustrated headshot of Joe Friel

The Upside of Growing Old

The OG of endurance sports coaching shares how bike racing and life have changed since he turned 70—and what you have to look forward to.

Why is it so hard to go easy?

Why Is It So Hard to Go Easy?

You know your workout is supposed to be easy, but you just can’t help dropping the hammer sometimes. A leading neuroscientist lifts the lid on what’s going on in your brain when this happens—and what you can do about it.