It's never too early to take care of your brain – sometimes just 30 minutes of walking a day is enough to make a difference
Brain care doesn't start in old age, but much earlier with the habits we build every day, often without realizing it. The latest research brings an encouraging message: just 150 minutes of aerobic activity per week can help the brain remain biologically younger and mentally sharper, even in middle age.
A study published in the Journal of Sport and Health Science showed that adults who exercised regularly for a year had, on magnetic resonance imaging (MRI) scans, brains that appeared to be almost a year younger compared to those who did not change their lifestyle.
What does it mean that the brain "looks younger"?
Today, through magnetic resonance imaging technology, scientists can assess so-called "brain age," an indicator that measures how old the brain appears compared to the person's chronological age.
When the brain appears "older" than its actual age, this is related to:
- cognitive decline,
- poorer physical functioning,
- higher risk for chronic diseases,
- even increased risk of mortality.
Therefore, even small changes in "brain age" can have a big impact in the long term, the Telegraph reports.
- A year of exercise makes a measurable difference
The study involved 130 healthy people, aged 26 to 58. They were divided into two groups:
- One group continued their usual lifestyle.
- The other group followed an aerobic exercise program for a year.
The program included:
- Two supervised sessions per week, 60 minutes each,
- Additional activity at home to achieve about 150 minutes of aerobic exercise per week, a level that complies with international recommendations for maintaining health.
MRI scans and physical fitness tests were performed at the beginning and end of the study.
The results were clear:
- In the exercising group, brain age decreased on average by about 0.6 lives.
- In those who did not exercise, a slight increase in brain age was observed.
- The difference between the two groups was almost a full year in favor of those who are physically active.
Why does even a small change matter?
Although less than a year may seem like a modest change, researchers point out that the effects accumulate over time.
Every “year” less in the biological age of the brain is associated with:
- better cognitive performance in old age,
- lower risk of mental decline,
- better overall neurological health.
From a longevity perspective, even a slight "rejuvenation" in middle age can have significant benefits in the decades that follow.
How does exercise affect the brain?
The researchers analyzed several factors to understand the mechanism of this effect, including:
- improving physical condition,
- blood pressure,
- body composition,
- levels of the protein BDNF (Brain-Derived Neurotrophic Factor), which plays a key role in brain plasticity.
However, none of these factors individually fully explained the reduction in brain age. This suggests that physical activity acts through more complex mechanisms, including:
- improving cerebral circulation,
- reducing inflammation,
- subtle structural changes in brain tissue,
- stimulating neural connections.
Why is middle age crucial?
Most studies on the brain focus on the elderly, when the aging processes have already accelerated.
This study is important because it focuses on people in their thirties, forties, and fifties, a period when preventive intervention may have maximum effect.
The idea is clear: if we can slow down brain aging before serious problems arise, we increase the chances of delaying or reducing the risk of dementia and cognitive decline in later life.
What does this mean for everyday life?
The study authors emphasize that the participants were healthy and that the changes are relatively small, so larger, longer-term studies are needed to confirm the findings.
However, the message remains practical and powerful: If you ask yourself what you can do today to protect your brain tomorrow, the answer is simple: Move regularly.
Sometimes, the best "therapy" for the brain starts with a simple walk. /Telegraph/
