Face-down, simply elevate your legs on an exercise ball remaining on the balls of your feet and toes, your arms on the ground. Perform a controlled push-up. "You are forcing all of your core to fire," says Gavin, "It's very difficult."
Powered By ZergNet
Action-Packed Summer Trips
Race Dune Buggies, Explore Italy, Bike Yellowstone
Plus: Fighting Poachers and Oil Companies in Congo
ON NEWSSTANDS NOW
Nick Offerman's Life Advice
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.