Why is it that people hate waking up even after getting 7-9 hours of sleep?
In: Biology
It depends on what phase you wake up in during your sleep cycle. If you finish your 90 minute sleep cycle and wake up around then, even if it’s only been 3 hours, you won’t feel as tired as of you wake up in the middle of your REM cycle, even if you have already slept 7+ hours.
Also some people need more sleep than others or are on a different sleep cycle (variations of naps during the day and less time at night)
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