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> Bad sleep (I now use the calculator at sleepyti.me and have had great results) Interesting site, didn't knew about it! I've checked it out, and as I wake ev

> Bad sleep (I now use the calculator at sleepyti.me and have had great results) Interesting site, didn't knew about it! I've checked it out, and as I wake everyday at 7am, it suggests me four different hours: 10pm, 11:30pm, 1am and 2:30am. What I find interesting is that none of it matches exactly the 8h average sleep value. As you say that you have had great results, could you comment a little bit on that? Thanks!

kowdermeister 9y ago
I often push it too far and stay up till 3AM and wake up around 7:45 and then I can just proceed normally that day. I'm a bit melancholic on those days, but that's it :D I was a bit surprised that this site suggested the 3AM as an option to fall asleep.
Kuiper 9y ago
The point of the calculator is to time your sleep so that you wake up between REM sleep cycle (rather than being awoken by your alarm in the middle of a REM cycle, which usually puts you in groggy zombie mode). The calculator works off the assumption that the average sleep cycle is 90 minutes (1.5 hours), so it calculates times that would allow you to wake up between sleep cycles (9 hours, 7.5 hours, 6 hours, and 4.5 hours all being multiples of 1.5 hours). https://en.wikipedia.org/wiki/Sleep_cycle https://en.wikipedia.org/wiki/Sleep_cycle
joncrocks 9y ago
It's offering sleep patterns that match multiples of 90 minutes. I think this is on average one 'sleep cycle'. Waking is easier between cycles and you wake feeling more refreshed (I think).
twobyfour 9y ago
8 hours is typically time from bedtime to wake time. It allows for some time spent falling asleep, and maybe one wake-up to visit the bathroom. You'll notice that your suggested wake times are an hour and a half apart. Natural sleep cycles tend to run about 90 minutes (on average). So 7.5 hours would be 5 cycles. 8 hours is 5 cycles plus that buffer time. I haven't used the app you mention, but I have begun a habit of getting out of bed between cycles instead of whenever in the cycle my alarm goes off. It definitely increases morning alertness and willingness to get up. Not sure it affects restedness much. And I've been measuring my sleep in cycles (or at least in 90 min increments) instead of in hours - which gives me a much clearer perspective on how much I've had and need.

kowdermeister 9y ago

I often push it too far and stay up till 3AM and wake up around 7:45 and then I can just proceed normally that day. I'm a bit melancholic on those days, but that's it :D I was a bit surprised that this site suggested the 3AM as an option to fall asleep.

Kuiper 9y ago

The point of the calculator is to time your sleep so that you wake up between REM sleep cycle (rather than being awoken by your alarm in the middle of a REM cycle, which usually puts you in groggy zombie mode). The calculator works off the assumption that the average sleep cycle is 90 minutes (1.5 hours), so it calculates times that would allow you to wake up between sleep cycles (9 hours, 7.5 hours, 6 hours, and 4.5 hours all being multiples of 1.5 hours). https://en.wikipedia.org/wiki/Sleep_cycle https://en.wikipedia.org/wiki/Sleep_cycle

joncrocks 9y ago

It's offering sleep patterns that match multiples of 90 minutes. I think this is on average one 'sleep cycle'. Waking is easier between cycles and you wake feeling more refreshed (I think).

twobyfour 9y ago

8 hours is typically time from bedtime to wake time. It allows for some time spent falling asleep, and maybe one wake-up to visit the bathroom. You'll notice that your suggested wake times are an hour and a half apart. Natural sleep cycles tend to run about 90 minutes (on average). So 7.5 hours would be 5 cycles. 8 hours is 5 cycles plus that buffer time. I haven't used the app you mention, but I have begun a habit of getting out of bed between cycles instead of whenever in the cycle my alarm goes off. It definitely increases morning alertness and willingness to get up. Not sure it affects restedness much. And I've been measuring my sleep in cycles (or at least in 90 min increments) instead of in hours - which gives me a much clearer perspective on how much I've had and need.