Started in 2012, the project studies the fitness and health data of about 5000 schoolchildren, the whole school-age population of Hódmezővásárhely. We measure various different parameters of all schoolchildren two times a year and study the reaction of their bodies to exercise. The objective of the project is twofold: first, we examine the health effects of everyday PE class, second, we want to develop inexpensive screening methods to detect health irregularities at an early stage.