The general objective of FitCity is to design and implement an advanced semantic infrastructure for intelligent data management, integration and elaboration which aims at stimulating physical activity of citizens, by promoting the adoption of an active lifestyle also among people that usually don’t practice sport in a regular way. The data collected on different variables, such as space, time, type of activity, social relationships and physiological parameters are collected from general use technological tools such as smartphones and related applications, podometers, heart rate monitors, motor and position sensors. The final goal of the project is to create a technological service which helps the public authorities on a given territory to analyze and monitor the lifestyle and the quality of the physical activity performed by the population, providing the base for defining the strategies and territorial plans to enhance the physical activity and therefore the health of citizens.