The stability ball crunch is a great alternative to traditional floor crunches. This exercise is done in much of the same way as a regular stability ball crunch. The difference is that the crunch is done against resistance. The use of resistance is used to make the exercise more challenging.

Start by positioning the middle of the back on the ball. The resistance tubing must be secured [low to the ground] around a stationary object. Tightly grasp the resistance tubing handles and place them on the chest as shown in the demonstration. Slowly contract the abs by leaning forward. Be sure to exhale as you crunch the abs. Hold the position for 2 or 3 seconds and repeat the exercise.