Add Yahoo as a preferred source to see more of our stories on Google. "Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." Today's ab routines are more ...

If you're like me, you've taken one look at the ab wheel at the gym and gone running back to your mat. For such a small piece of equipment, the ab wheel is intimidating, and with good reason. Eric and ...

Today's ab routines are more versatile than ever. Sure, you can slog through sets of situps and rounds of planks over and over again. But, more and more, core workouts incorporate tools like Swiss ...