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 ...

Walk into any gym and you’ll be met with a sea of weight machines. With so many options, it’s easy for even the most seasoned lifters to feel overwhelmed. Between the dozen gym machines that claim to ...

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 ...