FitBack is the European Network for the Support of Development of Systems for Monitoring Physical Fitness of Children and Adolescents at local, regional, national and European levels that will allow examination of population trends, the effects of national policies and interventions, and enable the prediction of future trends related to physical fitness. FitBack supports: a) adolescents, parents, teachers, physicians and coaches with FitBack online application that provides feedback on Alpha fit tests results with European reference values and related health risk; b) policy makers on local, regional and national level with essential information about establishing systems for the monitoring of physical fitness of children and adolescents.