Most people agree—aside from building bigger arms and bulging pecs, there's nothing that screams I'm in shape than abs. While a six-pack starts in the kitchen (even more so for an eight-pack), cable ...

The reverse crunch is a challenging core exercise that primarily hits your rectus abdominis, the muscle in your abdomen that makes up your “six-pack.” It’s a simple exercise that you can pick up in ...

Feel free to leave the training mat hanging and stay on the ground–or better yet, get on your knees. If you should focus on ...

For core workouts from Stephanie Mansour — plus fitness challenges, walking podcasts, meal plans and inspiration — download the Start TODAY app! When it comes to toning the abdominals, many of my ...