Abstract: A device for lowering the risk of cancer and/or the risk of a cancer relapse and/or other diseases includes an internet portal, for detecting a user's physical activities, which are carried out using a connected database and corresponding algorithms relating to a recommended daily dose of physical movement and on the basis of which recommendations to the user for additional physical activities are automatically generated and transmitted to the user so that the user is capable of performing the daily or weekly user-individual physical activities that are suitable for significantly lowering the risk of cancer or the risk of a cancer relapse. The system is designed as a self-learning unit designed such that the recommendations which are vocalized by the device are adapted constantly and are improved while taking into consideration the accumulated data.