1. Department of Training and Sport, Educational Institutions of the Police of Thuringia, Meiningen, Germany.
2. Faculty of Health, School of Medicine, Institute for Integrative Health Care and Health Promotion, Witten/Herdecke University, Witten, Germany.
3. Faculty of Health, School of Medicine, University Clinic for Integrative Health Care, Institute for Integrative Health Care and Health Promotion, Witten/Herdecke University, Witten, Germany.