Hello everybody, I have a question about sleep length. I am not into the polyphasic sleep cycles, I prefer larger chunks of sleep. But I am not sure that right now I am getting the right amount, or waking up at the right time. I currently aim for a 9:30 PM to 5:30 AM schedule, which is 8 hours, and probably more like 7 and change, once I actually fall asleep. However, I haven't had many days yet where I actually feel rested. Mostly, I wake up extremely groggy, almost like I'm being forced out of deep sleep.

There are some problems I already know, like for example I have often simply not been getting enough sleep (5 to 6 hours), or not keeping my schedule consistent enough. I also have insomnia, not chronic, but often enough to mess with my sleep goals--about once a week I'll go to bed maybe at 10, but not fall asleep until midnight. (Any tips for insomnia would be appreciated as well)

But I was wondering, since the general consensus is that sleep cycles are each an hour and a half long, is it even worth it to work towards an 8 hour a night sleep schedule? Should it always be either 7.5 or 9, so that I complete all my sleep cycles?