New research confirms that regular exercise—at any age—can boost brain health, improve memory, and help fight Alzheimer’s disease
It’s a common myth that memory loss and confusion are inevitable parts of ageing. In reality, they are symptoms of disease—not destiny.
Dementia is a serious brain disorder, and Alzheimer’s disease is its most common form. Right now, over 472,000 Australians are living with dementia. Without breakthroughs in treatment or prevention, that number is expected to more than double by 2058, according to the National Centre for Monitoring Dementia.
For decades, scientists believed the adult brain was fixed. But we now know the brain has remarkable plasticity—it can grow new cells and forge fresh neural connections. Exercise plays a powerful role in the process.
Science Says
Brain scans reveal that even moderate physical activity is linked to better brain function. People who move more tend to have larger, healthier brain regions critical for memory and learning, according to the Alzheimer’s Society.
A 2025 review by the University of South Australia confirmed that all forms of exercise—regardless of type, intensity, or duration—can significantly improve brain performance and memory at any age. Remarkably, the benefits can emerge within just 1 to 3 months. Even low-impact activities like yoga, walking, or Tai Chi show measurable improvements in cognition.
Strength training is particularly promising. University of Sydney researchers have shown it can preserve key brain areas that are vulnerable to Alzheimer’s, with protective effects lasting up to a year after training ends.
Why Exercise Works
Exercise is a form of beneficial stress that strengthens the brain in several ways:
- Improved blood flow: Physical activity increases circulation to the brain, delivering vital oxygen and nutrients while helping clear out harmful waste.
- Neurogenesis: Exercise stimulates the growth of new brain cells and reinforces connections between them.
- BDNF regulation: A 2024 Frontiers in Neurology study found that exercise helps regulate brain-derived neurotrophic factor (BDNF), a protein critical for brain cell survival, particularly in people with neurodegenerative conditions.
- Lower inflammation: Chronic inflammation is a known driver of cognitive decline. Exercise acts as a natural anti-inflammatory across the body and brain.
Key Takeaways
- Movement matters: Any activity—walking, gardening, lifting weights—can enhance brain health.
- See results fast: Cognitive gains often appear within 1 to 3 months of starting regular exercise.
- Mix it up: Aim for 150 minutes of moderate aerobic activity and two strength sessions weekly. Mind-body exercises like yoga or Tai Chi add extra benefits.
Dementia isn’t an inevitable part of ageing—and exercise remains one of our most accessible, effective tools to help fight it.
Sources:
- University of South Australia: Exercise boosts brainpower at any age
- Dementia Australia: Prevalence Data 2023 Updates
