Ball Crunch

Start:  Lie on your back on a stability ball.  Place hands on thighs, across chest, pointed toward ceiling (pictured), or overhead.

Movement:  Crunch up towards the ceiling keeping the ball as still as possible.  Keep hips/legs and neck/head relaxed.  Think about pivoting at the belly button.

Finish:  Shoulder blades off the ball in a crunch position.

Progression:  Change arm position, add weight across your chest, add weight overhead, use resistance tubing