In a world of "biohacking" and "optimization", it's easy to forget the basics. A new study published in Neurology reminds us of the simplest, and most scientifically based, habit for slowing brain aging: regular physical activity. And there is an important nuance in this.
The study
The team followed for 4 years early age Parkinson's patients. During the period, the participants underwent repeated MRI scans and cognitive tests, and each of them recorded their level of physical activity in a daily diary.
Why Parkinson? Because it is a disease that clearly accelerates brain aging. If exercise helps Parkinson's patients, it will surely benefit the general population as well.
The findings: 3 structural changes
The participants who engaged in regular physical activity showed three atypical symptoms after 4 years:
- Slower depletion of the cerebral cortex. The cortex, the outer layer of the brain, is responsible for higher functions: memory, attention, problem solving. In active people, it decreased at a significantly lower rate
- Less volume loss in the hippocampus. The hippocampus, the center of memory, is better preserved. This translated directly into better memory
- Less loss of volume in the amygdala. The amygdala is responsible for emotion and detecting threats. Maintaining it translated to higher emotional stability and less anxiety
The critical finding: the structural changes translated into function. Not only did the brains of the active people look younger on MRI, they also performed younger on tests.
The nuance: it doesn't have to be intense
One of the important insights in the study: the protection came from a wide range of activities, not just "real" training. The participants who benefited the most were those who engaged in daily activities:
- Walking (even 30 minutes a day)
- Gardening
- Swimming
- Cycling
- table tennis
- dance
People who "were active but did not train professionally" received the same protection as people who did organized fitness training. Movement is movement.
What about resistance training?
Another study published in 2026 in MindBodyGreen pointed out an interesting addition: Resistance training (weights) can lower the "age of the brain" by 2.3 years. The best combination: aerobics + strength training, two-three times a week each.
Why does it work?
Physical activity benefits the brain through several parallel mechanisms:
- BDNF (Brain-Derived Neurotrophic Factor): a growth factor that encourages the creation of new neurons. Significantly increased after physical activity
- Improved blood flow: more oxygen and glucose to the brain
- Reducing inflammation: moderate exercise lowers pro-inflammatory cytokines
- Improved metabolism: improved insulin sensitivity is directly linked to brain health
- Quality sleep: active people sleep better, which helps clear waste from the brain
Practical plan
Based on the research, here is what can be implemented:
- Minimum 30 minutes of movement per day. Not necessarily consecutive. 3 walks of 10 minutes = 30 minutes
- Resistance training 2 times a week. 20-30 minutes at a time. Dumbbells, straps, or body weight
- Diversity. Find an activity you enjoy. The rhythm is more important than the type
- "Exercise snacks". Walking 5 minutes every hour during the work day improves the score a lot
The bottom line
There is no magic secret to slowing brain aging. But if you had to choose one, regular exercise is the first. And now we know: you don't have to be an athlete. You just have to move. consistent and sufficient.
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