1. Department of Sport Psychology, Faculty of Sport Science, Ruhr University Bochum, Bochum, Germany
2. School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Australia
3. Department of Sports Medicine and Health Promotion, Friedrich-Schiller-University Jena, Jena, Germany
4. Center for Interdisciplinary Prevention of Diseases Related to Professional Activities, Friedrich-Schiller-University Jena, Jena, Germany