Why We Sleep
While even experts haven’t reached a consensus explanation for why we sleep, numerous indicators support the view that it serves an essential biological function.
In adults, a lack of sleep has been associated with a wide range of negative health consequences including cardiovascular problems, a weakened immune system, higher risk of obesity and type II diabetes, impaired thinking and memory, and mental health problems like depression and anxiety.
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Most adults function best after 7-9 hours of sleep a night.
When we get less than 7 hours, we’re impaired (to degrees that vary from person to person). When sleep persistently falls below 6 hours per 24, we are at an increased risk of health problems
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