1 Faculty of Sport and Health Sciences, University of Jyväskylä, Finland; Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio; Central Finland Health Care District, Jyväskylä.
2 National Institute for Health Research, Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust, University of Bristol, United Kingdom; Translational Health Sciences, Bristol Medical School, Musculoskeletal Research Unit, Southmead Hospital, United Kingdom.