Meta-analysis finds combined exercise and tDCS improves cognition in older adults
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Key Takeaway
Consider the reported cognitive benefit of combined exercise and tDCS in older adults as associative, not causal.
This is a meta-analysis of randomized controlled trials examining the effect of combined exercise and transcranial direct current stimulation (tDCS) on cognitive impairment in older adults. The scope was to synthesize evidence on overall cognition, memory, and executive function.
The key synthesized finding is that global cognitive function significantly improved with the combined intervention. The pooled effect size was a standardized mean difference (SMD) of 0.62, with a 95% confidence interval of 0.36 to 0.89. This indicates a moderate improvement based on the pooled data.
The authors note that this is a meta-analysis of randomized controlled trials and that it reports associations from pooled data, not direct causation. The review does not report specific limitations, safety data, or practice relevance.
Given the evidence, clinicians should interpret these results as supportive of a potential benefit but recognize that the certainty and generalizability are not fully defined. The findings suggest a role for this combined approach, but more research is needed.
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View Original Abstract ↓
ObjectiveThis study investigated whether combining exercise with transcranial direct current stimulation (tDCS) improves overall cognition, memory, and executive function in older adults.MethodsFollowing PRISMA guidelines, we systematically searched databases including PubMed, Web of Science, CNKI, and Wan Fang for randomized controlled trials (RCTs) examining the combined effect of exercise and tDCS on cognitive function in older adults. Used RStudio (version 4.2.0) to merge effect sizes and represent them as SMD with a 95% confidence interval (CI). The main effects are synthesized using a random effects model, and heterogeneity sources are explored through subgroup regression and sensitivity analysis.ResultsThe combined exercise and tDCS intervention significantly improved global cognitive function in older adults (SMD = 0.62, 95% CI: 0.36 to 0.89, p
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