: Why is it recommended to have 8 hours of sleep when sleep cycles happen every 90 minutes, wouldn’t waking up at 8 hours be in the middle of your cycle?

Question

I’ve learnt a little about sleep cycles and remember that every 90 minutes is when we move through the 5 stages of sleep, but I’ve also heard it’s recommended to have 8 hours of sleep. Wouldn’t that make you feel drowsy if you’re interrupting the sleep cycle when you wake up after 8 hours?

In: Other

Answer 1

8 is a magic number which is divisble by 24. 24 is the number of hours of the day.

8 hours go to sleep/in bed.
8 hours go to work/travel to and from work.
8 hours go to free time, dinner, friends, entertainment.

You don’t mess with the holy trinity. You (sleep) gets a piece, your boss gets a piece and you yourself (as a person) gets a piece.

This is why decimal time won’t ever get implemented. It’s based on 10 hours a day. A brilliant concept. But it is not divisible by 3.

Prediction: 6-hour work day will be the norm in the near future.