Rest long enough between sprints so you can go as fast in the next rep as you did in the last. But don't take so long that you stiffen up. One minute of rest for 10 seconds of sprinting is a good rule of thumb.
Credit: John Kelly / Getty Images
The 2014 Adventure Issue
From Iceland's Highway 1 to Utah's Canyonlands, an epic itinerary for modern explorers.
Plus: Building a Bigger Action Hero
ON NEWSSTANDS NOW
The Interpreters We Left Behind
The Rise of Cyclocross
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.