1. Department of Sports MedicineNorwegian School of Sport Sciences Oslo Norway
2. UiT—The Arctic University of Norway, Department of PsychologyFaculty of Health Sciences Tromsø Norway
3. Research Institute of Modum Bad Vikersund Norway
4. Department of Outdoor Studies, Sports and Physical EducationUniversity College of Southeast Norway Bø Norway
5. Department of Health and Caring Sciences, Faculty of Health SciencesUiT—The Arctic University of Norway Tromsø Norway