Knud Ryom holds a master and doctoral degree in sport and exercise psychology. Knud Ryom, PhD, is employed as associate professor at the Department of Public Health, University of Aarhus, Denmark. His research interest is physical activity, complex interventions and health promotion. Of particular interest are co-creation, system dynamics and community based participatory research. He also serves as editor of SJSEP (Scandinavian Journal of Sport Psychology).