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The myth of the eight-hour sleep

bbc.co.uk

61–70 of 168 posts

Re: The myth of the eight-hour sleep

#63
I have this weird sleep pattern, where I sleep from around 5pm-7pm or 7.30pm without an alarm clock, I am sleeping very deeply, always dreaming and really hard to wake me up (I don't notice the phone ringing right next to me) and then I'm sleeping from 1am to 6am, where I usually don't remember dreaming and where I wake up very easily

Re: The myth of the eight-hour sleep

#64
post #25

Earlier quoted context omitted.

Similar here, but I've found that as long as I don't drink caffeine after 3pm, I sleep well. Any later than that and I wake at 3am or so. Made such a difference when I discovered this... I lost a serious amount of grumpiness.

I must be seriously broken. I can even enjoy a cup of coffee at the bedside and still sleep. Not that I do that often. Falling asleep for me is easy. I pretty much always wake up about four hours later. Then sometimes I remain wide awake for another few hours. After which I'm ready for sleep again. The second bout is pretty glorious. This does mean however, that I need to pretty much put 11 hours aside each night, if…

i'm basically immune to caffeine, afaict.

i frequently come home late, drink a diet coke or whatever, and head straight to bed. i've gone back and forth between drinking a six pack of diet mountain dew a day and nothing and never noticed a difference. i can slam two bottles of Bawls (160mg) or eat 3 Fooshes (http://www.thinkgeek.com/caffeine/candy/6e27, >300mg total) and still take (and want) a nap.

if i gave myself anything close the amount of sleep i appear to be capable of taking, i'd never be up to get anything done....

Re: The myth of the eight-hour sleep

#65

My brother in law is a "sleep scientist" at UPenn. His recommendation is that sleep cycles typically happen in 4 hour intervals so it's best to sleep 4 or 8 hours a night. Getting up int he middle of a sleep cycle is often as bad as getting less than 4 hours of sleep. And going to bed drunk is the worst for your sleep cycle.

> 4 hour intervals

What about those 90 minute cycles that are also commonly cited in popular sleep-advice? Those wouldn't work into a 4hour schedule.

Re: The myth of the eight-hour sleep

#67
"In the early 1990s, psychiatrist Thomas Wehr conducted an experiment in which a group of people were plunged into darkness for 14 hours every day for a month."

'Plunging' people into 14 hours of darkness per day? Does this sound like a scientifically sound way to determine the natural sleeping patterns of humans?

Re: The myth of the eight-hour sleep

#68

Sleep is weird. If I wake up in the middle of the night and go back to sleep... I feel like ass the next day. If I get less than eight hours I'm pretty tired the next day. But science says that shouldn't happen!? Not enough evidence to suggest that there's any kind of regularity to how humans "should" sleep yet.

It is even more weird than that. From my and some friend's experience: if you sleep more then 9 hours straight, instead of usual 6-8 (this happens on weekends usually), I feel really terrible in the morning - not being able to get out of bed, but in the same time not being able to sleep. Finally when I get out of bed - I feel really trashed for next several hours. So it is not just less than 8 hours makes things wors…

Often when you wake up after sleeping longer than usual (say more than 9 hours) you feel tired because of dehydration. Your body loses a fair bit of water while you sleep, so that might be reason you feel bad after a lie-in.

Re: The myth of the eight-hour sleep

#69
The guy who did this study spent 20 years. He found 500 'references to segmented sleep'. One of which being a painting depicting people not sleeping and sleeping simultaneously.

That's less than one reference every 2 weeks. Either that guy had the most relaxing job in the world, or it is genuinely difficult to find such references. Assuming the latter to give the researcher the benefit of the doubt here; how deep do you have to look before you start to think that maybe this isn't actually that common after all?

Also, how the bbc title reflects this study is beyond me.

Re: The myth of the eight-hour sleep

#70
The New York Times took on this topic a few years back in a very good article that argued that the whole idea of the 8-hour sleep was invented by the mattress industry (and other purveyors of sleep products), and that humans don't need anywhere near 8 hours of continuous sleep.

Ironically, all of the industry's marketing makes people anxious about getting enough sleep--and makes it harder for them to get to sleep (thus propagating the need for more expensive mattresses and pillows.)

http://www.nytimes.com/2007/11/18/magazine/18sleep-t.html?pa...

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