The following muscle groups are activated with the Revoflex extreme: * Abdominal muscles (upper, middle, bottom, and side) * back muscles * arm muscles * shoulder muscles * thigh muscles * glutes How it works: The Revoflex Extreme takes advantage of bidirectional power. 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. What’s in the Box?: * 1 x Revoflex Extreme * 1 x Travel Bag * 1 x Manual * 1 x Diet guide