Scientists Find 7 Hours' Sleep Is Best for Middle-Aged Brains - Everyday Health

Middle-aged and older adults have worse cognitive function when they get too little or too much sleep, a new study suggests.

Whether our minds stay sharp as we age may depend on how much rest we get, a new study suggests. For the study, published April 28 in Nature Aging, scientists examined data on almost 500,000 adults … [+3453 chars]

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