Are you over sleeping? If yes, be careful.
Sleeping for extended amounts of time may be an early indicator of cognitive decline in older people, especially among those with lower education levels, researchers report.
Elderly participants who consistently slept more than 9 hours a night had double the dementia risk over a decade of follow-up in an analysis of data from the Framingham Heart Study.
Longer sleepers also had smaller brain volumes in the study of close to 2,500 older men and women, now online in Neurology.
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