Why Open-Skill Exercise Beats Running for Protecting the Aging Brain

Not all exercise is created equal when it comes to brain health. A sweeping 2025 review published in Brain Sciences by Kumagai and colleagues at Kumamoto University draws a sharp line: sports that demand real-time adaptation to an opponent — like table tennis, badminton, and tennis — produce measurably greater cognitive benefits than repetitive activities like running, swimming, or cycling.

The conclusion is unambiguous: aerobic open-skill exercise appears more effective than closed-skill exercise in preventing age-related cognitive decline and dementia.

What Makes an Exercise “Open-Skill”?

Open-skill exercises (OSE) are performed in unpredictable, externally paced environments. You must constantly react to changing stimuli — a spinning ball, a moving opponent, an unexpected bounce. Table tennis sits at the top of the OSE classification (Category 4), alongside basketball, fencing, and badminton.

Closed-skill exercises (CSE) — running, swimming, cycling — are self-paced, predictable, and repetitive. Your brain goes on autopilot.

The distinction matters because the cognitive demands are fundamentally different. Table tennis forces simultaneous processing of visual tracking, spatial reasoning, motor planning, and split-second decision-making. Running does not.

The Meta-Analytic Evidence

The Kumagai review synthesizes multiple meta-analyses comparing OSE against CSE:

Zhu et al. meta-analysis (19 studies, participants aged 9.6 to 69.4 years): Cross-sectional data showed OSE produced significantly greater improvements in inhibitory control and cognitive flexibility compared to CSE. These are the exact executive functions that erode with age and predict dementia onset.
Heilmann meta-analysis (19 studies, participants aged 10.2 to 69.9 years): Confirmed OSE superiority in executive function, with the strongest effects on cognitive flexibility, followed by inhibitory control and working memory.

Critically, the benefits were consistent across all age groups but were particularly pronounced in older adults — the population most at risk for cognitive decline.

Table Tennis and the Motor Control Highway

A 2024 study by Wei and colleagues at Shanghai University of Sport provides the neural-level evidence. Using transcranial magnetic stimulation (TMS), they compared older adults with table tennis experience, fit aerobics experience, and sedentary controls.

The key finding: reactive motor control differed significantly across groups (F(2,88) = 6.380, p = 0.003, effect size = 0.127).

The table tennis group performed significantly better than both the fit aerobics group (p < 0.05) and the sedentary control group (p < 0.01). There was no significant difference between the aerobics group and controls.

But the neural data was even more telling:

pre-SMA to M1 connectivity (the pathway from pre-supplementary motor area to primary motor cortex): The table tennis group showed the highest regulatory efficiency, and this was the only group where neural network regulatory ability negatively correlated with stop-signal reaction time. Better brain wiring directly predicted faster inhibitory control.
DLPFC to M1 connectivity (dorsolateral prefrontal cortex to primary motor cortex): The table tennis group showed the most robust inhibitory regulation. The DLPFC is a core region for executive function and working memory — functions devastated by dementia.

This is not correlation. The table tennis players had structurally different neural connectivity patterns in the brain networks responsible for motor control and executive function.

The Mechanism: Why Table Tennis Rewires the Brain

The Kumagai review outlines the neurobiological cascade that makes OSE uniquely brain-protective:

Neurotrophic factor release: OSE triggers BDNF (brain-derived neurotrophic factor) and IGF-1 expression. BDNF promotes neuronal survival, synaptic strengthening, and hippocampal neurogenesis — the creation of new brain cells in the memory center.
Amyloid beta metabolism: Regular aerobic OSE promotes clearance of amyloid-beta plaques, the pathological hallmark of Alzheimer’s disease.
Cerebral blood flow enhancement: Table tennis is characterized by approximately 96% moderate-intensity aerobic activity, delivering sustained oxygen and nutrients to brain tissue.
Neuroplastic remodeling: Table tennis induces measurable neuroplastic changes in motor-related regions, visual processing areas (particularly motion-visual cortex), and the frontal cortex — the command center for executive function.
Inflammation reduction: Chronic neuroinflammation accelerates cognitive decline. OSE reduces systemic inflammatory markers.

The 9.6% Number That Should Alarm Everyone

The Kumagai review cites a meta-analysis finding that the annual conversion rate from mild cognitive impairment (MCI) diagnosed in clinical settings to full dementia is at least 9.6%. That is not a lifetime risk. That is per year.

MCI is the warning stage — the window where intervention can still alter the trajectory. Once dementia develops, the options narrow dramatically. This is precisely where open-skill exercise shows its greatest value.

What the Exercise Science Field Has Been Missing

The broader exercise science community has been conflicted. A 2025 narrative review by Dhahbi and colleagues in Sports Medicine - Open noted that while aerobic exercise moderately improves cognitive function, the results have been inconsistent across studies. The LIFE Study, a major 24-month randomized trial, found no significant cognitive differences between exercise interventions and health education.

The missing variable? Exercise type. Grouping all exercise together — running, weightlifting, table tennis, swimming — dilutes the signal. When researchers separate OSE from CSE, the picture sharpens: open-skill exercise consistently outperforms.

Cognitive Flexibility: The Brain’s Most Valuable Skill

Among the executive functions enhanced by OSE, cognitive flexibility — the ability to shift between mental tasks, adapt strategies, and process novel information — showed the greatest improvement.

This is not a trivial skill. Cognitive flexibility is one of the first functions to decline in early Alzheimer’s disease. It underpins the ability to navigate daily life: managing finances, following conversations, adapting to new situations. Losing it means losing independence.

The Practical Prescription

The research points to a clear recommendation:

Minimum: 3-4 sessions per week, 40-60 minutes per session, at 60-70% maximum heart rate
Duration: Benefits emerge after 6+ months of consistent play
Type: Open-skill exercise with dynamic opponent interaction
Table tennis specifically: Provides the highest cognitive demand-to-physical strain ratio of any racket sport

You do not need to be competitive. You do not need to be athletic. You need a table, two paddles, a ball, and a partner.

The Takeaway

The science has moved beyond “exercise is good for the brain.” The question now is which exercise, and the answer is increasingly clear: sports that combine aerobic intensity with unpredictable cognitive demands. Table tennis sits at the intersection of both.

While running strengthens your heart, table tennis strengthens your heart and your prefrontal cortex, your motor control networks, and your executive function. In the fight against cognitive decline, that difference may be the one that matters most.

Sources:

Kumagai S, Park H, Chen S, Yamasaki T. “The Impact of Open-Skill Exercises and E-Sports on Cognitive Function: A Narrative Review of Their Role in Preventing Cognitive Decline and Dementia.” Brain Sciences. 2025;15(7):682.
Wei JN, et al. “Table tennis experience enhances motor control in older adults: Insights into sensorimotor-related cortical connectivity.” International Journal of Clinical and Health Psychology. 2024;24(2):100464.
Dhahbi W, et al. “Physical Activity to Counter Age-Related Cognitive Decline: Benefits of Aerobic, Resistance, and Combined Training.” Sports Medicine - Open. 2025;11:56.