Cognitive Performance following Single- or Multi-Session Exercise Intervention in Middle Age: A Systematic Review

Area of Science:

• Neuroscience
• Cognitive Psychology
• Public Health

Background:

• Alzheimer's Disease (AD) pathology can emerge in middle age, making this a critical period for dementia risk intervention.
• Research is increasingly exploring modifiable behaviors, such as exercise, for dementia risk reduction.
• Focusing on middle-aged adults (45-65) offers a proactive approach to cognitive health.

Approach:

• Systematic review of exercise intervention studies on cognitive function in healthy middle-aged adults.
• Searched major databases including PubMed, PsycINFO, MEDLINE, Cochrane, and Google Scholar.
• Included studies utilizing validated neuropsychological measures for cognitively unimpaired individuals.

Key Points:

• Single-session exercise interventions showed improvements in response inhibition but mixed results for cognitive flexibility; no significant changes in attention, working memory, or processing speed.
• Multi-session exercise interventions yielded varied results, with improvements in verbal memory but mixed outcomes for attention, working memory, processing speed, and executive function.
• Significant heterogeneity in study designs, interventions, and outcome measures, including a lack of standardized neuropsychological testing, complicates direct synthesis of findings.

Conclusions:

• Exercise interventions show potential for enhancing specific cognitive functions in middle-aged adults.
• The heterogeneity and lack of standardized assessments across studies present challenges for definitive conclusions.
• Future research should focus on standardized cognitive assessments and long-term exercise interventions to better understand their impact on cognitive aging and dementia prevention.