1. Department of Fitness and Health, IST University of Applied Sciences, Düsseldorf, Germany
2. Department of Cardiology and Angiology, Elisabeth Hospital, Essen, Germany
3. Faculty of Sport Science, Ruhr University Bochum, Bochum, Germany
4. School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, QLD, Australia
5. Institute of Sports Science, Johannes Gutenberg University, Mainz, Germany
6. Institute of Sports and Preventive Medicine, Saarland University, Saarbrücken, Germany