Abstract
PURPOSE: Aggressiveness of adolescents is a major cause for the violence events in campus. The research results, however, were inconsistent regarding the effectiveness of physical activity reducing aggressiveness among this population. The current study was to examine the relationship about reducing adolescent aggressiveness resulted in exercise and sports. METHODS: We used a systematic meta-analysis approach to synthesize data from the published studies from 1969 to 2019. Two-language electronic databases were searched with ScienceDirect, PubMed, SpringerLink, Wiley, and EBSCOhost in English, and CNKI net, WIP net, and Wanfang Data in Chinese. The key search words included adolescent, physical activity, exercise, sports, fitness, aggressiveness, violence, and delinquency. The Review Manager 5.3 and meta-analysis of Stata SE were used to process and analyze the data. RESULTS: From the initial search, 761 articles were retrieved. Forty-three independent studies were identified as the qualified data to be included in the final analysis, representing a sample size of 129,853 adolescents (age range of 12 ~ 18 yrs). Of 43 articles, 20 with 34,952 adolescents were conducted in the correlation analysis between exercise and sports and aggression, 9 with 78,620 adolescents for externalizing, 10 with 1,419 adolescents for delinquency, and 4 with 202 adolescents for violence. Study quality was assessed with Jaded’s with an average score 1.7. Little publication bias was observed. The results showed a medium-negative correlation between aggressiveness of adolescents and exercise and sports (Summary Fisher’ Z = -0.11, p < 0.0001; Q = 1,578.5, p < 0.05; I-squared = 97.3%, 95% CI, -0.14 to -0.07). CONCLUSIONS: Participating exercise and sports is associated with improvement or reduction in selected aggressiveness in the sample of adolescents included. A need exists for a large, well-designed, and more inclusive meta-analysis and clinical investigations.
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