Isn’t waking up mid-cycle sub optimal?
In: 8
The 90 minute sleep cycle is just approximate. Some cycles is 60 minutes and some is 120 minutes. In addition it takes some time to fall properly asleep and enter the first sleep cycle. With all these uncertainties it is impossible to predict where you will be in the sleep cycle exactly 8 hours after falling asleep. And you are right that it is not always best to sleep for a full 8 hours, and sometimes you need to sleep a bit longer. People who do set up more advanced alarms in the morning tend to do a soft wake up procedure after 7.5 hours of sleep, maybe supported by monitoring for the current stage in the sleep cycle. And then a hard alarm at maybe 8.5 hours of sleep.
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