Adolescence is a critical time for the development of mental health problems. In fact, depression is most likely to occur during adolescence and young adulthood. It’s the leading cause of disability in young people worldwide.
At least one‐quarter of young people will experience an episode of depression before 19 years of age. By year 9, students who have experienced a mental disorder are on average two years behind in academic achievement compared to those without a mental disorder.
See more at: https://theconversation.com/how-physical-activity-in-australian-schools-can-help-prevent-depression-in-young-people-107889