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 rotation machine. This is the Chubby Checker–inspired ab machine you sit ...

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 ...

If the Terminator movies have taught us anything, it’s that machines can’t be trusted. This is especially true when discussing the exercise machines in your gym, which aren’t designed to accommodate ...