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Meta-analysis of exercise for post-stroke cognitive impairment shows cognitive and motor benefits

Meta-analysis of exercise for post-stroke cognitive impairment shows cognitive and motor benefits
Photo by KOMMERS / Unsplash
Key Takeaway
Consider exercise for post-stroke cognitive impairment, as meta-analysis shows cognitive and motor benefits.

This is a systematic review and meta-analysis examining the effects of exercise on patients with post-stroke cognitive impairment. The review synthesized data from a total sample of 4450 patients. The authors found that exercise interventions, including aerobic exercise, cognitive-motor dual-tasking, functional motor training, and task-based interventions, were associated with improvements in cognitive function, with a larger effect size for combined aerobic and task-based approaches (SMD = 1.18, 95% CI 0.68 to 1.68). The meta-analysis also reported improvements in motor function (MD = 13.98, 95% CI 10.06 to 17.89) and activities of daily living (MD = 16.78, 95% CI 12.97 to 20.58). Additionally, the review noted significant increases in serum levels of brain-derived neurotrophic factor (BDNF), glutathione (GSH), and neuron-specific enolase (NSE), and a notable decrease in interleukin-6 (IL-6). The authors did not report adverse events, follow-up duration, or study settings. Limitations were not detailed in the provided data. The review provides evidence-based guidance for early rehabilitation interventions, but the findings should be interpreted with caution due to the lack of reported safety data and other methodological details.

Study Details

Study typeMeta analysis
Sample sizen = 4,450
EvidenceLevel 1
PublishedMay 2026
View Original Abstract ↓
INTRODUCTION: Exercise may improve cognitive function in stroke survivors. However, no study has yet examined the most effective exercise modalities and associated changes in biomarkers. This study aims to investigate the effects of different exercise types on cognitive function and biomarker trends, providing evidence-based guidance for early rehabilitation interventions. METHODS: Data from randomized controlled trials were collected from January 1, 2000, to March 6, 2025, using medical subject headings combined with free-text terms from PubMed, Cochrane Library, Embase, Wanfang, CNKI, CSTJ, and the China Medical Information Database. The Cochrane Risk of Bias Tool was used to assess the quality of the studies. Review Manager version 5.4.1 was employed to conduct all statistical syntheses. RESULTS: The forty-four original studies involving 4,450 patients with PSCI(Post-stroke cognitive impairment) were analyzed. Subgroup analysis by exercise intervention type revealed larger effect sizes when combining aerobic exercise with other task-based interventions(cognitive-motor dual-tasking and functional motor training) [SMD = 1.18, 95% CI (0.68, 1.68)]. Patients also showed improvements in motor function [MD = 13.98, 95% CI (10.06, 17.89)] and activities of daily living [MD = 16.78, 95% CI (12.97, 20.58)]. Concerning molecular biomarkers, serum levels of brain-derived neurotrophic factor (BDNF), glutathione (GSH), and neuron-specific enolase (NSE) increased significantly, whereas interleukin-6 (IL-6) levels decreased notably in PSCI patients following exercise therapy. CONCLUSION: Structured exercise effectively improves cognitive recovery, motor skills, and daily functioning in patients with PSCI. These clinical gains are accompanied by favorable peripheral biomarker modulations, characterized by significantly increased serum BDNF and GSH, as well as markedly decreased IL-6 levels.
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