Exercise and Cognitive Aging: A Meta-Analysis of Macrovascular Cerebral Blood Flow and Cognitive Function in Older Adults
Wang Li1, Peiyou Chen1, Guoyi Li2
1School of Sport Sciences, Nanjing Normal University, Nanjing, China, 210023.
Related Experiment Videos
View abstract on PubMed
Summary
Regular exercise boosts cognitive function in older adults by enhancing cerebral blood flow (CBF) and cardiovascular efficiency. Structured exercise programs offer a non-pharmacological approach to improve brain health and mitigate cognitive decline.
Area of Science:
- Gerontology
- Neuroscience
- Exercise Physiology
Background:
- Cognitive decline is a significant public health issue in aging populations.
- Reductions in cerebral blood flow (CBF) are closely linked to cognitive decline.
- The precise impact of exercise on cognitive function and cerebrovascular health requires further clarification.
Purpose of the Study:
- To systematically review and analyze the effects of exercise on cognitive function and cerebral blood flow (CBF) in older adults.
- To investigate the relationship between CBF and cognitive outcomes following exercise interventions.
- To provide evidence-based support for exercise as a non-pharmacological intervention for brain health.
Main Methods:
- A systematic review and meta-analysis of randomized controlled trials (RCTs) and controlled trials published up to January 2024.
- Inclusion of 57 studies on cognitive function and 12 on CBF from major scientific databases.
- Calculation of standardized mean differences (SMDs) and weighted mean differences (WMDs) using fixed- or random-effects models, with regression analysis for CBF-cognition association.
Main Results:
- Exercise interventions significantly improved cognitive function (SMD = 0.52), particularly in inhibitory control, switching, memory, and verbal fluency.
- Exercise increased middle cerebral artery velocity (MCAv) (WMD = 1.88) and enhanced cardiovascular efficiency by reducing resting heart rate and pulse index (PI).
- Higher CBF was positively correlated with cognitive performance, especially in memory and verbal fluency.
Conclusions:
- Exercise enhances cognitive function in older adults through improved macrovascular cerebral blood flow and cardiovascular efficiency.
- Increased MCAv and reduced PI following exercise underscore its positive impact on macrovascular CBF and cognitive health.
- Structured exercise programs are recommended as a non-pharmacological strategy to promote brain health and delay cognitive decline in the elderly.