Introduction
SECONDARY
Physical activity is considered a key factor in the prevention of several chronic conditions [An emerging body of literature discusses factors influencing AST on an individual, cultural, social, physical, and political level. Social-ecological models highlight the role of the environment in behavioral choices [List of questions regarding the means of transport (in the adolescents’ self-report questionnaire)1 We would like to know how you get to school and back home from school on most days!Please describe your path between the door of your home and school in summer and in winterPlease give the most frequent variant, which can also consist of multiple means of transport(e.g. partly walking and partly taking a bus)!Therefore, our study aimed to examine the prevalence, correlates, and perceived barriers to AST in Leipzig, a city in Germany. We analyzed which environmental characteristics and which conditions are perceived as barriers by parents of primary and secondary school pupils and adolescents themselves (age 10 and above). In addition, we examined the potential effect modifiers of age, gender, socioeconomic status (SES), and distance.