... Material: Steel tube, advanced leather, sponge seat cushion. New abdominal exercise Sit up bench SZ-9868 Sit-up bench is an ... your abdominal energy to keep stabilized and perform the exercise. Combined with regular exercise and a sensible diet, it can help you tighten ... , nutate-up 2) Height-adjustable base for varying obligue exercise 3) Exercise and strengthen the power of your arms and waist 4 ...