Objectives

characterise physical levels and patterns of young people
identify locations visited by UK adolescents that are associated with different profiles of physical activity
determine what attracts adolescents to these types of locations and what features of the physical and social environment influence their reasons for visiting
development of new measures of the physical and social environment related to physical activity
describe aspects of the real or perceived environment associated with activity levels
to determine whether these factors differ by weight status, gender, ethnicity, social position
to determine whether these factors differ in urban environments compared with non-urban
to determine whether these factors change over time between primary school and secondary school
to identify targets for development of effective interventions
to inform and influence policy.