Get the Men's Fitness newsletter!
A CrossFit tradition.
According to new study.
That's how long it took Tim Peake to run a marathon in space.
Ethiopia claimed all three podium spots in the men's race.
This guy will run 26.2 on the International Space Station treadmill.
New study shows benefits of higher anaerobic fitness levels.
Take it to the streets with these expert tips from a Nike+ Run Club coach.
How do you sweat: "typical," "low-salt," or "salty"?