The document outlines a project aimed at evaluating an automated health coaching system utilizing heart rate variability (HRV) measurements to provide individualized nutritional and activity guidance. By integrating mobile health technology, the initiative seeks to improve health outcomes by empowering users to take responsibility for their fitness and nutrition through real-time support. The study will involve around 200 participants over one year to assess the system's acceptance and effectiveness in daily life, with anticipated societal benefits including increased health awareness and reduced healthcare costs associated with chronic diseases.