"Older adults"@en . "e2e4f54cbe0a2c0262cf013c6e6d9b87" . "Determinant"@en . "Ageing"@en . "Environment"@en . "Sebastien" . "Children"@en . "Adolescents"@en . "Physical activity"@en . "Screen time"@en . "Obesity"@en . "Sebastien F.M. Chastin" . . "Youth"@en . "Sedentary behaviour"@en . "Determinants"@en . . "System-based approach"@en . "Chastin" . "Life-course"@en . "Sitting"@en .