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Moderate physical activity performed in midlife or later appears to be associated with a reduced risk of mild cognitive impairment — and a six-month high-intensity aerobic exercise program can improve cognitive function in individuals who already have the condition.
Each year, 10 percent to 15 percent of individuals with mild cognitive impairment will develop dementia, as compared with 1 percent to 2 percent of the general population.
Physical exercise may protect against mild cognitive impairment by means of the production of nerve-protecting compounds, greater blood flow to the brain, improved development and survival of neurons and the decreased risk of heart and blood vessel diseases.
Eurekalert January 11, 2010
Archives of Neurology January 2010;67(1):71-9
Archives of Neurology January 2010;67(1):80-6