title: The Lancet Physical Activity Observatory: promoting physical activity worldwide.
authors.affiliation: Federal University of Pelotas, 96020-220 Pelotas, Rio Grande do Sul, Brazil. Electronic address: prchallal@gmail.com.
authors.forename: Pedro C
authors.initials: PC
authors.lastname: Hallal
authors.affiliation: Federal University of Pelotas, 96020-220 Pelotas, Rio Grande do Sul, Brazil.
authors.forename: Rafaela C
authors.initials: RC
authors.lastname: Martins
authors.affiliation: Universidad de los Andes, Bogotá, Colombia.
authors.forename: Andrea
authors.initials: A
authors.lastname: Ramírez
mesh_terms: D000293:Adolescent; D000328:Adult; D006293:Health Promotion / Q000379:methods*; D006801:Humans; D009043:Motor Activity; D062486:Public Health Surveillance / Q000379:methods*