Acute Exercise Improves Large-Scale Brain Network Segregation in Healthy Older Adults
Yash Kommula1,2, Daniel D Callow1,3, Jeremy J Purcell1,4
1Department of Kinesiology, School of Public Health, University of Maryland, College Park, Maryland, USA.
Brain Connectivity
|June 18, 2024
Summary
Acute exercise enhances brain network segregation in older adults, improving functional connectivity. This may counteract age-related cognitive decline and mental health issues by boosting neural network integrity.
Area of Science:
- Neuroscience
- Gerontology
- Exercise Physiology
Background:
- Age-related cognitive decline is linked to reduced brain network segregation.
- Exercise improves cognition and neural function in older adults.
- Acute exercise effects on resting-state functional connectivity (rsFC) in older adults are understudied.
Purpose of the Study:
- To investigate the impact of acute exercise on rsFC in healthy, active older adults.
- To test if acute exercise improves functional segregation in cognition and affect networks.
- To explore how acute exercise influences neural network integrity relevant to aging.
Main Methods:
- rsFC data analyzed from 37 healthy older adults.
- Participants completed 30 min of moderate-to-vigorous cycling and a seated rest control.
- A within-subject crossover design with counterbalanced conditions was used.
- Key networks studied included frontoparietal (FPN), salience (SAL), default mode (DMN), and affect-reward (ARN).
Main Results:
- Acute exercise increased segregation between the SAL and DMN.
- Greater segregation was observed between the SAL and ARN after exercise.
- These changes indicate altered rsFC in key cognition and affect networks.
Conclusions:
- Acute exercise positively alters rsFC in older adults.
- Exercise promotes greater functional segregation in brain networks.
- Findings suggest acute exercise may oppose detrimental age-related neural dedifferentiation.
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