Working out may ward off Alzheimer's.
D000328:Adult; D000368:Aged; D000544:Alzheimer Disease / Q000453:epidemiology / Q000517:prevention & control*; D003704:Dementia / Q000453:epidemiology / Q000517:prevention & control; D015444:Exercise; D006801:Humans; D007899:Leisure Activities; D008875:Middle Aged; D014481:United States / Q000453:epidemiology