Crunch (Stability Ball)

Also known as: Crunch (Stability Ball).

Crunch on exercise ball.

How to perform this exercise

1. Rest the mid-back on a stability ball with feet wide on the floor and hips supported by the ball.
2. Draw the ribs toward the pelvis and curl only the shoulders and upper back a short distance upward without pulling on the head.
3. Lower the upper back slowly; do not turn the movement into a full sit-up.