The Commuting and Health in Cambridge study was developed by David Ogilvie, Simon Griffin, Andy Jones and Roger Mackett and
initially funded under the auspices of the Centre for Diet and Activity Research (CEDAR), a UKCRC Public Health Research Centre of
Excellence (087636/Z/08/Z and ES/G007462/1). Funding from the British Heart Foundation, Economic and Social Research Council, Medical
Research Council, National Institute for Health Research and the Wellcome Trust, under the auspices of the UK Clinical Research
Collaboration, is gratefully acknowledged. The study is now funded by the National Institute for Health Research Public Health Research
programme (project number 09/3001/06: see http://www.phr.nihr.ac.uk/funded_projects). David Ogilvie is supported by the Medical
Research Council (Unit Programme number MC_UU_12015/6). Jenna Panter is supported by an NIHR post-doctoral fellowship (NIHR-PDF-
2012-05-157). The views and opinions expressed herein are those of the authors and do not necessarily reflect those of the NIHR PHR
programme or the Department of Health. The funders had no role in study design, data collection and analysis, the decision to publish, or
the preparation of the manuscript. We thank all staff from the MRC Epidemiology Unit Functional Group Team, in particular for study
coordination and data collection (led by Cheryl Chapman), physical activity data processing and data management.