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 ...

According to experts, it takes just four core workouts to absolutely rip your top half to shreds, so you can get stronger.

If you’re after six-pack abs, you’re in the right place. The core workouts below have been hand-picked by top trainers to help you build muscle and forge a rippled midsection with enough definition to ...