Stand on platform and hold cable handles to your sides. Keep your head up, back straight and your knees slightly bent. Bend at the waist and lean forward until your upper body is parallel to the ground. Pause briefly then return to the starting position. Do not allow muscles to relax before next repetition.
Sit sideways on a bench and grasp the edges of the bench for support. With bent knees, raise your legs slightly and then straighten them. Lean backward as balance requires. Next, lift your knees up towards your chest while keeping your lower legs pointed downward and flexing (tightening) your abs as hard as you can. Keep continuous tension on the abs throughout this movement. This works both upper and lower abdominal muscles.