Until recently, scientist thought that the number of brain cells was fixed in adolescents and adults. New research identified stem cells in the brain that can regenerate injured cells. Taiwanese scientist showed that exercise could increase brain cells in the hippocampus-- a part of that brain linked to memory and emotions. Exercise appears to reduce stress and inflammation, which causes favorable changes in the brain.
Many psychiatrists use exercise training as a way to improve mental health. Exercise is good for the brain, as well as for the metabolism and cardiorespiratory system. (Cell Transplantation 20:1, published online March 10, 2011)
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