title: Exploring environmental determinants of physical activity--the road to the future is always under construction.
authors.forename: F J
authors.initials: FJ
authors.lastname: van Lenthe
authors.forename: S P J
authors.initials: SP
authors.lastname: Kremers
authors.forename: J
authors.initials: J
authors.lastname: Brug
mesh_terms: D001294:Attitude to Health; D004777:Environment; D006801:Humans; D009043:Motor Activity; D014505:Urban Population