Add Yahoo as a preferred source to see more of our stories on Google. Your favorite ab-building machine at the gym may be causing you more harm than good. That's right—we're talking about the torso ...

WHAT DO DEADLIFTS, squats, rows, slams, and even overhead presses all have in common? They all depend on the stability and strength of your core. A strong base requires strong abs. This muscle group ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? That said, different ab machines function in very different ways, so it's ...