Sit on a stability ball, facing a wall. Lie back so the middle to small of your back is resting on the ball. Place your feet hip-width apart on the wall with your knees bent 90 degrees; cross your arms over your chest. Curl up and twist through the waist to the left. Return to center and curl down so your back is parallel to the floor, then twist up to the right. That's one rep. Do 10 to 12.
Bruce Algra's Swiss Ball Workout Poster is terrific exercise chart and fitness routine for men and women to use when using a ball. This workout routine presents exercises that shape, strengthen, and develop the chest, biceps, triceps, and back muscles. Bright colors highlight the muscles exercised and include just the right amount of instruction. A great fitness program using free weights and an easy on the body ball.
-- Women's health stability ball flat-belly-moves -- [:|\/|:] I love using stability balls. I put in so much effort and get a good workout in, but I can last a long time without getting tired. The magical wondrousness of the stability ball.
Start in a pushup position, with your hands on a BOSU trainer and your feet hip-width apart (a). Lower your left forearm onto the BOSU (b), then your right, keeping your body in a straight line (c). Push back to the starting position, starting with your left hand. That's one rep; do 10 to 15. Rest for 15 seconds, then repeat, leading with your right arm. Keep alternating for two or three sets.