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
Anthony Bourdain's Life Advice
The NFL's Pot Problem
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.