Crunch Twist On Ball with Tubing Resistance

Using tubing firmly attached to a door frame, lie on a ball with your left side toward the door and the tubing tensioned over your left shoulder. While holding the crunch and tightening the abs, rotate at your waist, twisting toward the right using your obliques. Repeat 20 times, then switch to the opposite />br /> Alternate Crunch Twist on Ball with Resistance: Instead of tubing, use a light weight, such as a 5 pound plate or dumbbell, held behind your head for resistance.