AP
There's plenty of evidence that mental exercise, such as crossword puzzles and reading, may reduce Alzheimer's risks, but previous studies on brain benefits from physical exercise had conflicting results.
The new findings, contained in two studies, clarify how much exercise might be beneficial and are good news for older people who want to avoid mental decline but "don't like doing all that awful, sweaty stuff," said Bill Thies, vice president for medical and scientific affairs of the Alzheimer's Association.
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