Centre for Urban Transitions, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia; email: nowen@swin.edu.au, nhadgraft@swin.edu.au. Behavioural Epidemiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia; email: neville.owen@baker.edu.au. School of Public Health, University of Queensland, Herston, Queensland 4006, Australia; email: g.healy@sph.uq.edu.au, b.clark3@uq.edu.au, a.goode@sph.uq.edu.au, e.eakin@uq.edu.au. MRC Epidemiology Unit, Institute of Metabolic Science, University of Cambridge, Cambridge CB2 0QQ, United Kingdom; email: paddy.dempsey@mrc-epid.cam.ac.uk. Physical Activity Laboratory, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia; email: paddy.dempsey@baker.edu.au, david.dunstan@baker.edu.au. Institute for Physical Activity and Nutrition, Deakin University, Burwood, Victoria 3125, Australia; email: jo.salmon@deakin.edu.au, anna.timperio@deakin.edu.au, h.koorts@deakin.edu.au, n.ridgers@deakin.edu.au. Iverson Health Innovation Institute, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia; email: glambert@swin.edu.au. Human Neurotransmitters Laboratory, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia; email: gavin.lambert@baker.edu.au. CSL Limited, Bio21 Institute, Melbourne, Victoria 3010, Australia; email: Bronwyn.Kingwell@csl.com.au. Metabolic and Vascular Physiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Victoria 3004, Australia; email: bronwyn.kingwell@baker.edu.au. Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria 3000, Australia; email: david.dunstan@acu.edu.au.