Choosing the right mattress Remember squirming on those hard schoolroom chairs, waiting for the bell to ring? You were restless for a reason: That hard wooden chair put a lot of pressure on your behind. A mattress that’s too firm can have the same effect: Lying on the stiff surface puts pressure on your shoulders…

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Older adults who are sleepy during the day might have harmful plaque building in their brain that is a sign of impending Alzheimer’s disease, researchers report. A hallmark of Alzheimer’s is the accumulation of a protein in the brain called beta-amyloid. It’s believed that one benefit of sleep is to clear beta-amyloid, and poor sleep…

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