The strategic placement of the ball allows you to focus the toning work on those hard-to-reach middle abs.
- Start sitting, and place the ball at your low ribs. Then lean back, so your torso is almost parallel to the floor. Place your hands behind your head, keeping your elbows wide.
- Exhale, pulling your abs to your spine while pressing the low ribs into the ball to perform a curl. The movement is small but concentrated.
- Inhale, and lower your chest without arching your back. Repeat the crunch with each exhale.
- Do 25 reps for a set, and do at least two sets.