Renderer says BOSU balls, Ab Rollers, and TRX devices can offer great ab workouts. So if you belong to a gym that offers these gadgets, try them out. But if you exercise at home, save your money. Between planks, pikes, crunches, seated twists, and more, there are plenty of effective ab exercises that won't cost you a dime.
Credit: Getty Images
Powered By ZergNet
The Brutal Charm of an NFL Hit Man
Plus: Jesse Ventura vs. the Navy Seals
ON NEWSSTANDS NOW
When to Say No to Your Doctor
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.