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The LancetPhysical Activity Observatory: promoting physical activity worldwide

2 years ago, at the time of the London 2012 Olympic and Paralympic Games, The Lancet launched a Series on the worldwide pandemic of physical inactivity. 1 The Series showed that a third of adults and 80% of adolescents around the world do not reach recommended levels for daily physical activity (30 min and 60 min of physical activity of moderate-to-vigorous intensity per day for adults and adolescents, respectively). 2 Physical inactivity was shown to be responsible for 5· 3 million deaths per year worldwide. If inactivity decreased by only 10%, half a million deaths could be averted every year. 3 There is reasonable understanding on why some people are active and others are not, 4 and several interventions, within and outside the health sector, are known to be effective at increasing physical activity in the population. 5, 6 As for …