The radio frequency quickly raises the muscle temperature by a few degrees. This heats up the treatment area; the stomach, buttocks or arms. This prepares the muscles for exposure to stress, similar to what a warm- up does before a workout. In less than 4 minutes, the temperature in the subcutaneous fat reaches a level that causes apoptosis, i.e. fat cells are permanently damaged and slowly removed from the body. Furthermore, the EM tight DUO, just like the EM tight, contracts the muscle fibers in the treatment area at intensities that are not achievable during regular training. Extreme stress forces the muscle to adapt, resulting in an increase in the number and growth of muscle fibers and cells. Although the device builds muscle mass and burns fat, your skin remains unaffected. After the treatment(s) you can expect a flatter and tighter stomach and/or tighter buttocks and your muscle mass will have increased significantly.