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.

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 ...