Engaging in regular physical activity early in life can significantly reduce the risk of dementia, according to a recent study. Conducted by researchers, the study suggests that staying active, particularly before the age of 50, has a crucial role in preventing dementia. By maintaining exercise habits, individuals may protect key areas of the brain associated with memory and thinking, potentially delaying cognitive decline. The research also indicates that a lifetime of physical activity could help mitigate the impact of Alzheimer’s disease markers, like the accumulation of amyloid protein, even in those already displaying signs of the condition.
The study, based on data from Insight46, a sub-study of the National Survey of Health and Development, followed 5,362 participants born during the same week in March 1946 across England, Scotland, and Wales. Among the 468 individuals studied at the age of 70, researchers found that engaging in activities such as walking, swimming, cricket, rugby, and football consistently before and after turning 50 was associated with better cognitive function at 70, especially among women. Those who participated in physical activities at least once a month before the age of 50 exhibited less shrinkage in the hippocampus, a critical brain region for memory and learning.
Dr. Sarah-Naomi James, from the UCL Dementia Research Centre, highlighted the importance of preserving brain volume through exercise. She emphasised that physical activity could help individuals maintain cognitive function, even in the presence of early signs of dementia. Despite the positive outcomes observed, more research is needed to understand the specific mechanisms through which physical activity benefits the brain.
Alzheimer’s Research UK, a co-funder of the study, estimates that over 982,000 individuals in the UK are currently living with dementia. The organisation stresses the importance of preventative measures, such as staying active, managing heart health, engaging in stimulating activities, and maintaining social connections to reduce dementia risk. Dr. James reinforces the idea that it is never too early or too late to start taking steps to safeguard brain health through physical activity.
In summary, the research underscores the significant impact of exercise on reducing the risk of dementia and maintaining cognitive function in later life. By incorporating regular physical activity into daily routines, individuals can potentially delay the onset of cognitive decline, highlighting the importance of prioritising exercise for brain health.