Ball Crunch with Tubing Resistence
Using tubing firmly attached to a door frame or anchor point (approximately at chest height), lie on the ball with your back toward the anchor point and the tubing across your shoulders, held by your hands near your chest. Tighten your abs and slowly curl up, concentrating on using your abs so that your head and shoulders come up to a position that is approximately halfway between lying and sitting. Hold for 5 seconds, then roll back down slowly to the starting position, keeping your abs tight all the way back. Start with a tension that allows 20 reps. As this gets easier, increase the resistance by re-tensioning/tightening the tubing, or using tubing that offers greater resistance. Alternate Ball Crunch with Resistance: Instead of tubing, use a light weight (5 pound plate or dumbbell) held behind your head for resistance.