Background Rates of physical activity decline throughout adolescence, and evidence indicates that this has an adverse impact on psychological health. This paper aims to synthesise available evidence for physical activity interventions on the mental health and well‐being of young people (11–19 years) from the general population. Method Nine databases were searched to identify studies published between January 2005 and June 2020: Web of Science, ProQuest Psychology Journals, PsycINFO, Pub Med, ASSIA, CINHAL PLUS, SPORTDiscus, EMBASE and Wiley Online Library. Key search terms included ‘physical activity intervention’, ‘mental health’ and ‘adolescen*’. Eligible studies were independently screened by two authors based on inclusion/exclusion criteria. Results Twenty‐eight interventions were narratively synthesised in four categories: Quality of Life (QOL), self‐esteem, psychological well‐being and psychological ill‐being (e.g. depression, stress). A large proportion (67.9%) of interventions were multicomponent and combined physical activity with other features such as health education (e.g. nutrition). However, only a limited number (N = 5) specifically addressed mental health. Findings suggest that interventions are useful in improving psychological well‐being and QOL, yet evidence for self‐esteem is mixed. Conclusions Although effectiveness in improving well‐being is evident, evidence for a reduction in the frequency and severity of mental health problems is less clear. A summary of the overall impact of physical activity interventions on the mental health of young people is presented.

Objective This systematic review explored the effectiveness of using physical activity (PA) interventions to enhance psychological well‐being and reduce psychological ill‐being (e.g., anxiety and depression) in children aged six to 11 years old from the general population. Methods Electronic databases were searched for studies published between January 2005 and June 2020: Web of Science, ProQuest Psychology Journals, PsycINFO, Pub Med, ASSIA, CINHAL PLUS, SPORTDiscus, EMBASE and Wiley Online Library. Search terms included ‘physical activity intervention’, ‘psychological well‐being’ and ‘child*’. After removing duplicates, 11 390 studies were independently screened by two authors based on inclusion/exclusion criteria and assessed for risk of bias. Results A total of 23 studies were narratively synthesized and categorized into four domains: Quality of Life (QOL), body image, self‐esteem and psychological ill‐being. Evidence was provided for the impact of PA interventions in improving QOL, body image and self‐esteem. Despite the positive effect on psychological well‐being, evidence for a reduction in the frequency and severity of symptoms associated with psychological ill‐being in children is less clear. Conclusions Reviewed studies support the use of PA interventions in enhancing the psychological well‐being of children in school and community settings. More research is warranted to understand the impact of PA interventions on reducing psychological ill‐being in children from the general population.

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