your classic six-pack muscles), but it's so much more. MH fitness director Ebenezer Samuel, C.S.C.S. says this means inviting ...

To get a six-pack, you'll need to build your abs with exercises like Russian twists and leg lowers. Benefits of a strong core include improved posture, fewer injuries, and decreased back pain.

Reach back until you feel a stretch in your abs and then throw the ball straight down into the floor as hard as you can.