Effect of physical exercise on executive function in individuals with substance use disorder: A systematic review and...

The increasing number of individuals with substance use disorder (SUD) has a serious impact on individuals, families, and society. As a complementary therapy, physical exercise has been used in the rehabilitation of individuals with SUD. This study systematically aimed to evaluate the effect of physical exercise interventions on enhancing executive function in individuals with SUD.

Electronic databases were searched, covering the period from their inception to December 26, 2024. The Cochrane Risk of Bias Assessment Tool was utilized to assess the methodological quality of the included literature. Data were extracted from study graphs using GetData Graph Digitizer 2.26, and Stata 17.0 was also employed to conduct analysis. Grading of recommendations assessment, development and evaluation pro was utilized to evaluate the quality of evidence of outcome indicators.

Nine studies, encompassing 752 participants, were included in the analysis. Compared with the control group, physical exercise improved inhibition (Hedges's g = 0.47, 95% CI: 0.29 to 0.65, P < .001) and working memory (Hedges's g = 0.42, 95% CI: 0.16 to 0.69, P = .002), but did not significantly affect cognitive flexibility (Hedges's g = 0.51, 95% CI: -0.22 to 1.24, P = .170). Subgroup analysis revealed that physical exercise with single time of 46 to 60 minutes (Hedges's g = 0.39, 95% CI: 0.05 to 0.73, P = .024), 5 times per week (Hedges's g = 0.45, 95% CI: 0.07 to 0.83, P = .020), duration of 8 weeks (Hedges's g = 0.46, 95% CI: 0.14 to 0.77, P = .004) may improve working memory in individuals with SUD (these subgroup findings are exploratory and should be interpreted as hypothesis-generating).

Evidence from this study suggests physical exercise may enhance inhibition and working memory in individuals with SUD. However, the improvement in cognitive flexibility requires further investigation in future studies.