In the first half of the course, the students study trail running at their Physical Education lessons (discover this sport, training plans, practice, etc.). In the second part of the project, the two schools are involved in an international exchange, where the students are hosted in both countries by the local pupils. During these two exchanges, the students participate together in trail running races. Moreover, the students apply Physics (Energy) to their own data generated during the race (mass, distance, time, altitude, heart rate). They work in international groups and show the results with digital outcomes.