title: Measurement of physical activity by self-report in low- and middle-income countries: more of the same is not enough.
authors.affiliation: Epidemiology, Federal University of Pelotas, Brazil.
authors.forename: Pedro C
authors.initials: PC
authors.lastname: Hallal
authors.forename: Sandra
authors.initials: S
authors.lastname: Matsudo
authors.forename: José C
authors.initials: JC
authors.lastname: Farias
mesh_terms: D000054:Acceleration; D003906:Developing Countries / Q000706:statistics & numerical data*; D004734:Energy Metabolism; D006801:Humans; D007182:Income; D011939:Mental Recall; D009043:Motor Activity / Q000502:physiology*; D015203:Reproducibility of Results; D057566:Self Report; D012959:Socioeconomic Factors