As the global population ages,maintaining cognitive function is becoming increasingly crucial for public health. New research from Brazil offers compelling evidence that staying physically active might potentially be one of the most effective ways to protect brain health. A comprehensive analysis of nearly two dozen studies has revealed a strong link between exercise and larger brain volume in older adults, particularly in areas related to emotion and sensory processing. the findings offer further support for a lifestyle intervention with perhaps meaningful benefits for long-term neurological well-being.
Nearly 40 out of 76 brain regions examined showed greater volume in older adults who engaged in more exercise, according to research led by Professor Lucas Melo Neves of the Department of Physical Education at the State University of São Paulo (Unesp) in Rio Claro, Brazil. The study highlighted particularly larger volumes in the amygdala, which plays a key role in emotional processing, and the thalamus, the brain’s central hub for sensory information.
Researchers also observed a larger amount of white matter in those who were more physically active. White matter is composed of axons – the extensions of nerve cells – and is crucial for communication between different brain areas. “In fact, the total brain volume is larger in individuals with higher levels of physical activity,” Professor Neves stated.
These findings stem from a comprehensive review of 19 studies examining the link between an active lifestyle and brain volume, conducted by Professor Neves and student Sara Oliveira Dias de Lucena. This type of review, known as a systematic review, aims to identify consistent findings across multiple studies, strengthening the evidence base.
The studies included a total of 2,684 participants, many between the ages of 60 and 70, with some exceeding 80 years old. A key criterion for inclusion was the absence of neurological conditions such as Alzheimer’s or Parkinson’s disease. “These diseases could interfere with our interpretation because patients often exhibit a reduction in certain brain structures,” explained Lucas Neves, who has been researching the connection between exercise and the brain since his doctoral studies.
Does Exercise Increase Brain Size, or Slow Down Shrinkage?
“Possibly both,” responded Lucas Neves. “Just as we lose muscle mass as we age, the brain also decreases in size,” he explained. “My brain today, at 40 years old, is smaller than it was at 30. That’s normal. However, excessive atrophy is associated with dementia.”
Maintaining brain health is a growing public health priority as populations age, and this research adds to the growing body of evidence supporting the benefits of physical activity. A new analysis suggests that regular exercise may not only help slow age-related brain shrinkage but could also contribute to increased brain volume in key areas.
Researchers at the State University of São Paulo (Unesp) in Brazil have found a significant correlation between physical activity and brain structure in older adults. The study, led by Professor Lucas Melo Neves, examined data from 19 previously published studies involving a total of 2,684 participants.
The analysis revealed that nearly 40 out of 76 brain regions assessed were larger in individuals who engaged in more exercise. Notably, the amygdala – responsible for processing emotions – and the thalamus – which relays sensory information – showed particularly increased volume. These findings suggest exercise may bolster areas critical for emotional well-being and sensory perception.
The research also indicated that physically active individuals had more white matter in their brains. White matter, composed of nerve fibers called axons, facilitates communication between brain regions. “In fact, the total brain volume is larger in individuals with higher levels of physical activity,” Professor Neves stated.
To ensure the reliability of the findings, the researchers excluded participants with pre-existing neurological conditions like Alzheimer’s or Parkinson’s disease, which can independently affect brain structure. “These diseases could interfere with our interpretation because patients often exhibit a reduction in certain brain structures,” Lucas Neves explained.
The study raises the question of whether exercise actively increases brain size or simply slows down the natural age-related decline. Professor Neves suggests it may be a combination of both. “Just as we lose muscle mass as we age, the brain also decreases in size,” he said. “My brain today, at 40 years old, is smaller than it was at 30. That’s normal. However, excessive atrophy is associated with dementia.” The findings underscore the importance of maintaining physical activity throughout life to support cognitive health and potentially mitigate the risk of neurodegenerative diseases.
