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London, April 14 Exercise maintains insulin and body mass index (BMI) levels, which helps, protect brain volume and thus help stave off dementia, researchers have found.The study, published in the journal Neurology, showed the relationship between exercise and the metabolism of glucose in the brain was not affected by insulin or BMI levels.Reduced glucose metabolism in the brain can be seen in people with dementia."These results may help us to understand how physical activity affects brain health, which may guide us in developing strategies to prevent or delay age-related decline in memory and thinking skills," said Geraldine Poisnel, from Inserm Research Center in Caen, France."Older adults, who are physically active, gain cardiovascular benefits, which may result in greater structural brain integrity," Poisnel added.The study involved 134 people with an average age of 69 who had no memory problems. The people filled out surveys about their physical activity over the past year. They had brain scans to measure volume and glucose metabolism. Information was gathered on BMI and insulin levels as well as cholesterol, blood pressure and other factors.People with the most physical activity had a higher total volume of grey matter in their brains than people with the least amount of physical activity, with an average of about 550,000 cubic millimetres compared to about 540,000 cubic mm.When researchers looked only at areas of the brain affected by Alzheimer's disease, they found the same results.Those with the most activity also had a higher average rate of glucose metabolism in the brain than those with the least amount of activity.Higher physical activity was not associated with how much amyloid plaque - a marker for Alzheimer's disease - people had in their brains.Poisnel said more research is needed to understand the mechanisms behind these relationships."Maintaining a lower BMI through physical activity could help prevent disturbed insulin metabolism that is often seen in ageing, thus promoting brain health," Poisnel said.Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Health :Exercise may protect brain volume by keeping insulin, BMI levels low: Study

A new study has found that exercise can help protect brain cells. It has been suggested that the role exercise plays in maintaining insulin and body mass index levels may help protect brain volume and thus help stave off dementia. ...

Health :How exercise keeps dementia at bay

London, April 14 Exercise maintains insulin and body mass index (BMI) levels, which helps, protect brain volume and ... ...