Revoflex XtremeTummy Exercise Machine Workout Bi-directional Abs Wheel. Intense, light and effortless abdominal training!Train with the Revoflex Extreme just 5 minutes a day and you will achieve tremendous results. Different muscles are trained at once with this unique sports equipment. Get toned in the comfort of your home and get that body you've been dreaming.The following muscle groups are activated with the Revoflex extremes: Abdominal muscles (upper, middle, bottom, and side) The rubber bands set up an increased resistance while pushing forward and thus achieve a more intense workout. When sliding back the built-up tension is released slowly. This returns you easily to your starting position. You can choose between 6 different training levels and 44 different exercises and thus optimally tailor your workout to your body.