1. Department of Special Didactics, Faculty of Education and Sport Sciences University of Vigo Pontevedra Spain
2. Prevention Research Collaboration, Sydney School of Public Health The University of Sydney Camperdown New South Wales Australia
3. Department of Sports Medicine Norwegian School of Sports Sciences Oslo Norway
4. Motivation and Behaviour Research Program, Institute for Positive Psychology and Education, Faculty of Health Sciences Australian Catholic University Sydney Australia
5. Department of Chronic Diseases and Ageing Norwegian Institute of Public Health Oslo Norway