1. Institute for Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany
2. Think Tank, German Football Association (Deutscher Fußball-Bund; DFB), Frankfurt, Germany
3. Sport and Exercise Discipline Group, Faculty of Health, University of Technology, Sydney, Australia
4. Sport Science, University of Applied Sciences, Saarbrücken, Germany
5. Psychology, TSG ResearchLab gGmbH, Zuzenhausen, Germany
6. Performance Diagnostics, TSG 1899 Hoffenheim, Zuzenhausen, Germany