Attacking the pandemic of physical inactivity: what is holding us back?

Physical inactivity was characterised as a global pandemic in the 2012 Lancet series on physical activity and health.1 The extent of the pandemic, causes and potential solutions were further explored in other papers in the 2012 and 2016 series, and recommendations derived from these papers and an associated workshop are summarised by Ding et al. 2 This paper builds on these syntheses of global knowledge and assesses progress or the lack thereof...