Training B: Group B (n1= 25 CNS+, n2 = 25 CNS-) will receive a physical training that can be executed at home. The training will be based on xbox Kinect games (e.g. Shape Up) and comprise games and activities such as jump'n'run games, physical training, and dance activities. All material will be provided by the Inselspital Bern. One training session will last approximately 45 minutes and will be performed 3days a week over a period of 8 weeks.