James Dollman|Kevin Norton|Lynda Norton
Evidence for secular trends in children’s physical activity behaviour
University of South Australia|University of South Australia|University of South Australia
clear whether global increase weight problems children result excessive energy intake decreasing energy expenditure methodological limitations made difficult analyse evidence least part problem may lie increasing energy consumption important examine side energy equation also however possible conclusively describe physical activity trends absence suitable baseline data one solution summate available evidence many areas daily activities possible draw tentative conclusions review summarises available trend data direct representations physical activity range contexts together indirect measures sedentariness fitness attitudes conclusions drawn physical activity clearly defined contexts active transport school physical education organised sports declining many countries young people would like active often constrained external factors school policy curricula parental rules relation safety convenience physical environmental factors