1 Mackenzie Wearables Research Hub, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia emmanuel.stamatakis@sydney.edu.au.
2 School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.
3 Mackenzie Wearables Research Hub, Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia.
4 Physical Activity for Health Research Centre, University of Edinburgh, Edinburgh, Scotland, UK.
5 Infection, Immunity, and Cardiovasccular Disease, University of Sheffield, Sheffield, UK.
6 Norwich Medical School, University of East Anglia Faculty of Medicine and Health Sciences, Norwich, UK.
7 Danish Centre for Motivation and Behaviour Science, University of Southern Denmark, Odense, Denmark.
8 Faculty of Education, University of Cádiz, Cádiz, Spain.
9 Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA.
10 Harvard Medical School, Boston, Massachusetts, USA.
11 Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
12 British Heart Foundation Glasgow Cardiovascular Research Centre (BHF GCRC), Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.