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Exercise Benefits Dentate Gyrus Function: Bridging from Animal Models to Human High-Resolution Functional MRI of
Kazuya Suwabe1,2, Michael A Yassa3,4,5,6, Kenji Suzuki7
1Faculty of Health and Sport Sciences, Ryutsu Keizai University, Ibaraki, Japan.
Advances in Neurobiology
|September 26, 2025
Summary
Light-intensity physical exercise boosts brain plasticity and memory, particularly in the hippocampus. Research in humans confirms exercise benefits memory function, aligning with animal study findings.
Area of Science:
- Neuroscience
- Exercise Physiology
- Cognitive Psychology
Background:
- Animal studies show physical exercise enhances neural plasticity and memory, especially in the hippocampal dentate gyrus (DG).
- Light-intensity exercise yields greater benefits than high-intensity exercise in animal models.
- Human studies can now assess DG-dependent memory, bridging animal and human research.
Purpose of the Study:
- To outline methods for assessing human hippocampal pattern separation.
- To review studies on aerobic exercise effects on human DG function.
- To explore exercise's impact on memory and neural mechanisms.
Main Methods:
- Mnemonic discrimination tasks to assess hippocampal pattern separation.
- High-resolution magnetic resonance imaging (MRI).
- Review of cross-sectional, acute, and chronic exercise intervention studies.
Main Results:
- Aerobic exercise positively impacts human DG function and memory.
- Findings support the concept of exercise hormesis, where moderate exercise is beneficial.
- Evidence suggests a link between physical activity and enhanced hippocampal memory.
Conclusions:
- Aerobic exercise benefits human hippocampal memory and DG function.
- Exercise hormesis principles may apply to human cognitive benefits.
- Further research is needed to optimize exercise for memory enhancement and understand mechanisms.
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