There is an alarming global trend where both adults and adolescents do not meet the recommendation on physical activity that WHO has set. This is seen worldwide, and Sweden is not an exception. There is, however, a trend that adolescents in Sweden want to live healthier and be more active in their free time. Therefore, the thesis aims to investigate how two Swedish municipalities work to promote self-organized physical activity with adolescents in focus.  The study was conducted through semi-structured interviews with officials working in Linköping municipality and Uppsala municipality, and an official working in the National Sports Confederation. The interviews were analyzed through thematic analysis. The thematic analysis was also conducted on specific municipal and government documents. The main findings of the thesis are that to promote physical activity, the quality of place needs to be high, the feeling of security is vital, and there is a gap in how municipalities take citizens' thoughts and opinions into planning.