Running one sprint doesn't build muscle and lung power like repetitions can. Do as many reps as you can until your form breaks down or you can no longer sustain the speed of your first rep. "Always leave something in the tank," says Snideman.
Credit: Magnus Fond / 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
Duke Lacrosse and the Fog of Scandal
How Thailand's Most Notorious Prison Became a Fight Club
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