Michael Kellmann is head of the sport psychology unit in the faculty of sport science at Ruhr-University Bochum in Germany. Michael served six years on the executive board of the German Association of Sport Psychology and is on the editorial board of The Sport Psychologist, the Zeitschrift für Sportpsychologie, and the Deutsche Zeitschrift für Sportmedizin. Michael’s current research activities include prevention of overtraining and recovery enhancement, sport psychology diagnostics and intervention, coach behavior during competition and practice, and personality and performance competence of coaches in sports. Michael’s work has appeared in several publications. He is coauthor of Recovery-Stress Questionnaire for Athletes: User Manual and edited the book Enhancing Recovery: Preventing Underperformance in Athletes.