New research highlights the importance of physical activity and blood-sugar management in maintaining brain health, suggesting proactive habits could delay dementia.
A study published in Alzheimer’s & Dementia adds to evidence that what helps the heart may also help the brain. Researchers followed 402 adults in midlife and later life who had no signs of cognitive decline at the start, then tracked how a range of lifestyle and health measures related to changes in thinking over time.
The team assessed seven factors often linked to cardiovascular health: diet, physical activity, smoking, blood sugar, blood pressure, cholesterol and body mass index. Over the course of follow-up, activity levels and blood-sugar control stood out as the strongest links to slower cognitive decline, suggesting that early attention to vascular health may have longer-term benefits for brain function.
According to the report, higher physical activity was associated with a slower rate of decline among participants of Mexican American heritage. That fits with broader guidance from the US Centers for Disease Control and Prevention, which recommends at least 150 minutes of moderate-intensity exercise a week, or 75 minutes of vigorous activity, with gradual progress for people who are starting from a low baseline.
The same study found that healthier blood-sugar levels were linked with better cognitive outcomes among white participants. That result is consistent with other research showing that poor glucose control can damage blood vessels and nerve cells, while the brain’s dependence on glucose means both too much and too little can be harmful.
Experts say the findings reinforce the idea that brain health is not isolated from the rest of the body. The Mayo Clinic notes that regular exercise improves blood flow to the brain and can support memory and thinking, while the World Health Organization advises a balanced diet rich in fruit, vegetables, whole grains, lean protein and healthy fats as part of broader chronic-disease prevention.
The study does not suggest that exercise or glucose control alone can prevent dementia. Rather, it points to a wider set of habits that matter together: managing blood pressure, cholesterol and weight; not smoking; eating well; staying active; and being alert to sleep problems such as obstructive sleep apnoea. Taken together, the evidence supports a simple message: protecting the brain may begin well before old age.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
