The Karlsruhe Institute of Technology (KIT) and HEPA Europe (European Network for the Promotion of Health-Enhancing Physical Activity) invites all interested parties to the 2017 HEPA Symposium. The symposium takes place from March 29th to 30th, 2017 at the KIT Sports Institute, Karlsruhe, with the main theme of “Physical activity and physical fitness as determinants of health in children and adolescents". Physical activity and fitness researchers will present and exchange the latest breakthroughs in this exciting field, with posters, presentations, lectures and workshops filling the two day event. Interesting new research methods will be discussed and presented, specifically a workshop on "Methods for Interactive Ambulatory Assessment of Physical Activity and Lifestyle" unveils some exciting developments from us at movisens. We look forward to meeting you and all the other innovative researchers in this exciting field, and hope to hear your feedback about our new interactive ambulatory assessment system during the symposium.