DATE: September 12, 2012
EXCERPT: "It’s widely accepted among scientists that regular exercise transforms the brain, improving the ability to remember and think. And a growing and very appealing body of science has established that exercise spurs the creation of new brain cells, a process known as neurogenesis. But just how jogging or other workouts affect the structure of the brain has remained enigmatic, with many steps in the process unexplained.
A new study published last month in Proceedings of the National Academy of Sciences may fill in one piece of the puzzle, by showing that male sex hormones surge in the brain after exercise and could be helping to remodel the mind.
“We’ve known for a while that estrogen,” the female sex hormone, “is produced in the brain” not just of female animals but also, to some degree, in males, says Bruce S. McEwen, the director of the Laboratory of Neuroendocrinology at Rockefeller University in New York and an author of the study,
female brains also produce varying amounts of male hormones. So there may be some as-yet-undiscovered interactions between the male and female hormones in the brain that mesh after jogging to increase brain cell numbers and improve the ability to think." more
RELATED PUBMED LINK:
Okamoto M, Hojo Y, Inoue K, Matsui T, Kawato S, McEwen BS, Soya H. Mild exercise increases dihydrotestosterone in hippocampus providing evidence for androgenic mediation of neurogenesis. Proc Natl Acad Sci U S A. 2012 Aug 7;109(32):13100-5.
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