Scientists Find 7 Hours’ Sleep Is Best for Middle-Aged Brains
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 ranging in age from 38 to 73 who were part of the UK Biobank, an ongoing government-funded research project. All the participants were asked about their sleep habits and mental health and well-being, and they also completed a series of cognitive tests to assess brain function. A subset of about 40,000 people also had brain scans and lab tests to collect genetic information.People who got about seven hours of sleep each night had better cognitive outcomes than other participants, the analysis found. Longer or shorter periods of sleep each night were associated with a reduced…