Due to overweight and unhealthy lifestyle the number of patients with type 2 diabetes mellitus is increasing. Although in early phases the disease might be successfully treated by lifestyle change patients lack for motivation. Instead of increasing anti-diabetic medication a highly motivational system with low inhibition threshold is needed. Therefore, the investigators analyzed if regular use of the interactive videogame Wii Fit Plus over 12 weeks is able to improve HbA1c and weight in patients with type 2 diabetes.