How much is enough?
Getting enough sleep could play a crucial role in protecting your brain from Alzheimer’s disease. But how much do you need?
Most adults need a recommended 7 to 9 hours a night, according to the US National Sleep Foundation. But as we age, the amount of sleep we need does change. An 18-year-old, for instance, might need anywhere between 6 and 11 hours. Older adults appear to need as much sleep as younger adults, but struggle to get it.
As a general rule, you shouldn’t need to set an alarm to wake up in the morning. If you do, you probably aren’t getting as much sleep as you n
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