If a sleep cycle is approximately 90 minutes, how can 8 hours be the recommended sleep time?

Question

Isn’t waking up mid-cycle sub optimal?

In: 8

Answer 1

8 hours is general advice, optimally what works for most people falls within 7-9 hours. what works best for you is going to vary from person to person. and yes waking up in the middle of a sleep cycle also isn’t ideal for not feeling tired

ultimately the figure of 8 hours is an arbitrarily picked number