For years, sit-ups were considered the ultimate ab exercise. But modern research shows they’re not the safest or most ...

Develop your core with Bruce Lee's intense ab workout. Exercises like waist twists and leg raises can help you build strength ...

To add this three-step Turkish get-up to your next core routine, sub it in anytime you might do a sit-up. Here’s how to perform it properly: Mallory Creveling is an ACE-certified personal trainer and ...

There are two kinds of people in this world: People who want to work their core and people who consider core exercises their worst nightmare. But regardless of which camp you fall into, if you are ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." If your body were a bicycle, your abs and back muscles—your core—would be the frame. You need a ...