Set a watch timer for 15 minutes and see how many push-ups, squats, lunges, pull-ups, or dips you can do. No matter the number you accomplish, you'll hit more than 100 muscles in trying, building strength and endurance. Alternate this workout with the 30-minute full bodyweight circuit.
Credit: Photograph by John Loomis
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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