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Artist Greg Itahara’s exclusive singlet designs are popping up at the world’s biggest marathons, including the Chicago Marathon.

New information and expert-backed strategies to help runners stay strong and injury-free as their bodies change.

You’ll sweat, cramp, cry, maybe even pee blood! Here’s just how far your body will go to get you across that finish line.

Your eight-minute mile might not actually be an eight-minute mile. Here’s how to know if your treadmill is inaccurate—and how to fix it.

When your training plan indicates it’s tempo day, what does that mean for you? Running coach Greg McMillan breaks down how to calculate your running pacing based on workout and training zone.

The Chicago Marathon may be the main event, but make no mistake—Chicago is a runner’s paradise all year.

We put the president of the American Trail Running Association and our on-site correspondent Adam Chase, on the case.

Just because the government has ground to a halt doesn’t mean your legs need to. Runners for Public Lands Executive Director Kathleen Turner advises.

Kilian Jornet ran up 72 14ers in a month, completing his mega States of Elevation project. Photographers Nick Danielson and Andy Cochrane give an inside look into this dizzying-to-the-point-of-desensitizing feat.

Is it possible to run two marathons in a single season? Sure. Whether or not you should is another story.