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90 minute sleep cycle 
4th-Mar-2010 10:52 pm

I came across the concept of  90 minute sleep cycle on LJ few years back. If I remember correctly, it was either bluesmoon 's post or comment somewhere.

Couple of weeks back I was talking to a friend on how I wake up fresh when I sleep for time periods which are multiple of 90 minutes. He tried the same formula and confirmed, it probably works true for him also. Yesterday I was supposed to wake up another friend at 6.30 am, but I gave a wake up call 15 minutes earlier. My friend suggested I stick to the 6.30 am time sharp, otherwise, it disturbs his sleep pattern. I was reminded today about this, wondering if 6.30 am fell into the end of his 90 minute sleep cycle slot and probably thats the reason he feels fresh at 6.30 am and not anything before it. Probably it is not exactly 90 minutes for everybody, but I think there is some reason and equation for everybody atleast which works out approximately around 90 minutes.

I often have to remind myself that sleep, which is mostly an involuntary activity could trigger so much of research behind. Wiki says it all. 
I have to shut down googling on sleep, before I lose my sleep over it. Otherwise, i would have to wait for the next 90 minutes to time myself to wake up at my usual time :)


4th-Mar-2010 10:14 pm (UTC)
Since my own sleep has been disturbed (and pretty bad quality) for several years....I am interested in anything on the topic! :)
5th-Mar-2010 03:16 am (UTC)
I always wondered if you had time to sleep with so much of activity around you :)
5th-Mar-2010 12:41 am (UTC)
i usually set my alarm by counting to 6 hours from the time i go to bed and that keeps me refreshed!
5th-Mar-2010 03:16 am (UTC)
Ah, so it definitely has been working for you :)
5th-Mar-2010 03:24 am (UTC)
How very very interesting, and I have never heard of this before. I clicked your links, but I am not sure I understand. Jesse has had difficulty with sleep ever since he switched to working nights. It is a better job, but he has never been able to adjust to sleeping during the day. Or I should say that he sleeps, but he claims to never feel rested no matter how much sleep he gets.

So do you sleep for 3 hours and then a 90-minute nap like the guy that wrote that first article? How do you do it?

And help me out with the math. If Jesse goes to sleep each day at 10am, when should he wake up to feel rested?
5th-Mar-2010 03:40 am (UTC)
The math is you time your sleep in multiples of 90 minutes, i.e from the time of going to sleep, try waking up either after 3, 4.5, 6, 7.5 or 9 hours. Ideally 6 hours should be good, however based on the available time whether it is less or more, one can try 4.5 or 9 hours also. According to them it is better than sleeping for 5, 7 or 8 hours.

May be with Jesse, you should try waking him up exactly after 6 hours. I hope it works for him around 6 hours +/- 15 mins. If 10 am, try waking him up around 4 pm. What time does he wake up generally ?

I usually sleep for 6 hours, but if I am sleeping a little late, I have trouble waking up before 6 hours, so I am planning to sleep only for 4.5 hours when I dont have 6 hours in my hand. It should help if their logic works.

I hope the logic works for Jesse and all of you too..
5th-Mar-2010 12:54 pm (UTC)
Oh you're right! I love 9 hrs of sleep! :D
7th-Mar-2010 04:04 pm (UTC)
Pure Bliss :)
8th-Mar-2010 02:48 pm (UTC)
Well if your friend sleeps at 11:00 pm then 6:30 am will be 7.5 hours. If he sleeps earlier then you better wake him up earlier!!!
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