5 Scientifically Proven Brain Health Benefits of Running and Practical Guide by Professor Se-hee Jung
Drawing on over 20 years of clinical and running experience by Seoul National University College of Medicine's Professor Se-hee Jung, here are 5 scientifically
X user @wonla23 shared a concise breakdown of the five scientifically validated neurological benefits of running and practical aerobic training guidelines, based on more than twenty years of clinical rehabilitation and daily running experience by Professor Se-hee Jung of the Department of Rehabilitation Medicine at Seoul National University College of Medicine.
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Professor Se-hee Jung is a rehabilitation physician who has treated numerous neurological patients throughout her career. In her book The Brain on the Road and in public lectures, she emphasizes that running is far more than physical conditioning—it is one of the most effective aerobic triggers for restructuring and fortifying the brain. This breakdown covers the proven mechanisms of neurogenesis, synaptic plasticity, neurotransmitter regulation, neuroinflammation suppression, and toxic waste clearance.
1. Stimulating Neurogenesis and Boosting Memory
Moderate-to-vigorous aerobic exercise such as running significantly elevates Brain-Derived Neurotrophic Factor (BDNF) in the brain.
- Hippocampal Neurogenesis: BDNF directly drives the birth of new neurons in the hippocampus, the core region responsible for learning and memory formation. Since neuroscience demonstrated that adult human brains continue generating new neural cells, running has repeatedly proven to be one of the strongest stimulants for this process.
- Enhanced Learning and Dementia Prevention: The continuous generation of new neurons sharpens learning capacity, improves long-term recall, and provides a resilient neurological defense against cognitive decline and dementia.
2. Strengthening Synaptic Connectivity and Building Cognitive Reserve
Running physically strengthens the synaptic junctions through which brain cells communicate, enhancing signaling speed and efficiency.
- Synaptic Plasticity and Long-Term Potentiation (LTP): BDNF and related growth factors released during sustained aerobic activity elevate synaptic plasticity, facilitating Long-Term Potentiation across neural pathways.
- Cognitive Reserve: As neural circuits grow denser and more robust, the brain accumulates greater "cognitive reserve," empowering it to withstand aging, neurological trauma, or neurodegenerative conditions with reduced functional decline.
3. Modulating Neurotransmitters and Activating Dopamine Pathways
Running triggers the surge of vital mood- and motivation-regulating neurotransmitters, including dopamine, serotonin, and endorphins.
- Stress Reduction and Emotional Balance: The influx of these neurochemicals reduces stress responses, elevates baseline mood, and eases symptoms of anxiety and depressive disorders.
- Clinical Applications in Parkinson's Disease: Professor Jung notes that in Parkinson's patients, vigorous exercise activates the dopamine system to a degree comparable to—or exceeding—certain pharmacotherapies, improving symptoms while boosting focus, motivation, and overall quality of daily life.
4. Suppressing Chronic Neuroinflammation
Chronic low-grade inflammation is recognized as a primary driver in neurodegenerative diseases such as Alzheimer's and Parkinson's.
- Increased Anti-Inflammatory Cytokines: Sustained running boosts anti-inflammatory cytokines while suppressing pro-inflammatory compounds throughout the bloodstream and brain.
- Neuronal Protection: Dampening microinflammation protects brain tissue from early cellular death and degeneration, lowering long-term risks of neurodegenerative illnesses.
5. Activating the Glymphatic System and Flushing Toxic Waste
Aerobic exercise activates the brain's waste clearance apparatus, known as the glymphatic system.
- Accelerated Amyloid-Beta Clearance: Neurotoxic byproducts such as amyloid-beta, typically cleared during deep sleep, are flushed out more efficiently due to the elevated cerebral blood flow generated during exercise.
- Cerebral Hygiene: Aerobic workouts that induce elevated respiration and heart rates increase cerebral perfusion, keeping neural tissue clean and lowering the risk of Alzheimer's pathology.
Practical Running Guidelines and the 'Exercise Savings' Principle
Professor Jung emphasizes that casual walking alone is insufficient to trigger meaningful neurobiological adaptation; the body requires moderate-to-vigorous aerobic stimulus that makes you sweat and breathe hard.
- Meeting WHO Aerobic Targets: The World Health Organization recommends at least 150 minutes of moderate-to-vigorous aerobic activity per week. Running is one of the most time-efficient ways to achieve this target.
- High Return on Time: Just 20 to 30 minutes of running per session satisfies weekly requirements. Professor Jung notes that even 5 minutes of daily running significantly reduces mortality and improves brain health, making consistency far more important than extreme volume.
- Building an Exercise Savings Account: Physical activity accumulated during earlier years acts as an "exercise savings account," dramatically improving recovery resilience if neurological injury or illness occurs later in life.
- Pacing and Caution: As @wonla23 noted in the original thread, runners should never overexert themselves and must always adjust their pacing to match their current baseline fitness.