1. Department of Health & Social Psychology, German Sport University Cologne, Cologne, Germany
2. Unit of Sport Psychology, Faculty of Sport Science, Ruhr University Bochum, Bochum, Germany
3. Department of Medical Psychology and Medical Sociology, Ruhr University Bochum, Bochum, Germany
4. School of Human Movement and Nutrition Sciences, The University of Queensland, St Lucia, Australia
5. German Research Centre of Elite Sport – Momentum, German Sport University Cologne, Cologne, Germany