Development of an app to support people with fatigue symptoms. - Wittke, T.-C.; Wegner, N.; Schwalm, I.; Dopfer-Jablonka, A.; Happle, C.; Müller, F.; Riester, T.; Noack, E. M.; Schmachtenberg, T.; Stoelting, A. (German Journal of Sports Medicine / Deutsche Zeitschrift fur Sportmedizin, 2025)