Physical activity correlated with less brain shrinkage in old
age. Intellectual exercise did not. PROBLEM: The brain is a
muscle, says every teacher ever. Their point is figurative, but
the brain is like a muscle in the sense that it normally loses
size with age -- in some parts by as much as 25 percent. - Belly
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METHODOLOGY: A long time ago, Scotland surveyed the intelligence
of every Scottish child that had been born in 1936. More
recently, 691 of those former children celebrated their 70th
birthdays by filling out a survey about their social and
intellectual pursuits and their levels of physical activity.
Three years after that, they celebrated their 73rd birthdays by
undergoing brain MRI scans at the University of Edinburgh in
Scotland. The researchers assessed the brain images for physical
signs of cognitive decline. RESULTS: Physical activity was
associated with larger gray and no