Reverse Crunch on a Stability Ball
Grasp a secure object behind you to steady yourself while supporting your upper back on a stability ball. Leg raises, knee raises and reverse crunches can be done this way.
Having to balance on a stability ball forces the abs to work very hard to stabilize the body during all movements. A dumbbell bands or a cable pulley attachment can be used to add resistance.

Roman Chair Situps
Securely place your feet so that in a straight-legged position, yo… Continue