usatoday.com writes "Chester Santos has been training his brain for seven years.
At 32, he's not worried about losing his memory. He's taking advantage of a growing market in "brain fitness" spurred by aging baby boomers.
Teenagers cramming for tests and people worried about "senior moments" can now turn to an explosion of brain-assisting video games, such as Nintendo's Brain Age; puzzles that are said to ward off dementia, such as Sudoku and crosswords; and online tips that claim to train the brain."
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