About the Authors

Mark Hamer

m.hamer@ucl.ac.uk

Affiliations Population Health Domain Physical Activity Research Group, University College London, London, United Kingdom, Department of Epidemiology and Public Health, University College London, London, United Kingdom, School for Physiology, Nutrition and Consumer Sciences, North-West University, Potchefstroom, South Africa

Emmanuel Stamatakis

Affiliations Population Health Domain Physical Activity Research Group, University College London, London, United Kingdom, Department of Epidemiology and Public Health, University College London, London, United Kingdom, Prevention Research Collaboration, School of Public Health, University of Sydney, Sydney, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MH ES. Analyzed the data: MH. Wrote the paper: MH ES. Sourced the data: MH.