... Material: Steel tube, advanced leather, sponge seat cushion. New abdominal exercise Sit up bench SZ-9868 Sit ... is designed particularly for efficient sit-UPS, abdominal work and upper body workouts. It requires ... you to use whole of your abdominal energy to keep stabilized and perform the ... abdomen 6) Material: Steel tube, advanced leather, sponge seat cushion, padded rolls, curve bench1 set ...