Toss a 15-pound medicine ball against a wall above your head for 30 seconds. Do three 30-second sets, varying the angle of each toss, with a 30-second rest between sets.
Credit: Illustration by Jason Lee
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
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