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
Style & Design 2014
Tech, Tools, Toys & the Hottest New Gear
Plus: When to Say No to Your Doctor
ON NEWSSTANDS NOW
Mike Rowe Brings Back the Blue Collar Hero
Kidnapped in Syria: Anthony Loyd's Harrowing Story
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.