So grab your medicine ball, and let's get going ... And we're going to go down to the floor for crunch. If you can, put your legs in the air. You really want to make sure that you keep the ...

To sculpt the six-pack you've always wanted, situps and crunches alone won’t cut it. It's time to upgrade your ab routine. Firdose Khan, head trainer at Nine Innovations, an elite athlete training ...

While doing crunches and situps may activate the abs ... How to do it: Extend your arms straight out while holding a medicine ...