Study may explain why older people don't sleep well
A team from Harvard Medical School looked at data from the Rush Memory and Aging Project, which enrolled 1,000 healthy 65-year-olds and is following them until their deaths, after which their brains are donated for research. Beginning in 2005, the men and women in the study wore wristbands with motion recorders that enabled the researchers to determine how long and how well they were sleeping.
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