Impact of a Real-World Lifestyle Intervention in an Entire Latin American City with More Than 50,000 People

Objective The aim of this study was to assess the impact of a real-world, citywide intervention on physical activity and eating habits in a Latin American city with more than 50,000 inhabitants. Methods This was a plausibility assessment of a real-life intervention. A probabilistic sample (n = 1,424) from Jaguariuna (Sao Paulo, Brazil) was assessed before and after a 7-month intervention aimed at increasing physical activity levels and improving eating habits at a city level. Primary outcomes were physical activity, sedentary behavior, and eating habits assessed by a valid telephone inquiry. The secondary outcome was body weight. Results The proportion of individuals achieving the recommended intake of fruits and vegetables increased (18%; 95% CI: 2% to 36%; P = 0.031), whereas the number of individuals consuming soft drinks and exchanging main meals for snacks or junk food decreased (-35%; 95% CI: -45% to -22%; P < 0.001 and -16%; 95% CI: -29% to -1%; P = 0.037). The number of active individuals increased during leisure time (37%; 95% CI: 19% to 58%; P < 0.001), at work (17%; 95% CI: 4% to 32%; P = 0.009), and in the household (14%; 95% CI: 0% to 31%; P = 0.047). Body weight decreased among individuals with overweight or obesity. Conclusions This intervention promoted pronounced lifestyle changes (i.e., increased physical activity and healthier food choices) in the entire city, providing scientific-based evidence on which to build effective public health policies in Latin America.