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 ...

A CSCS trainer shares 5 standing exercises that work your core and build full-body strength after 60. No ab machines needed.

A CSCS coach shares 6 standing ab exercises after 50 that strengthen your core for real life, no machines needed.

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 ...