My science fair project in 4th grade measured how much sleep you got against how well you felt during the day. Conclusion: 8 hours is best.
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I like 9 personally. But 4th graders know all the best things. Why does it take all our lives to figure out how much we should sleep and what we should eat?

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I agree about 9.
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9 .... I've tried for 9 ... but only managed it once in the last 2 years. I track my sleep which helps with discipline? Certainly a quality 7.5 makes every day better.
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If people would like to see hard facts I’d definitely advise people to read Matthew Walker’s Why We Sleep. Gives a good insight into why sleep is needed and the impact of a lack of sleep night after night. Eye-opener...
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that explains why britain was fucked under thatcher, who famously 'survived' on 5hrs sleep each night
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Probably almost why she got dementia, could be wrong obviously.. Studies show a lack of sleep over a small amount of time has a massive effect on the body fighting bad enzymes (or something very similar) in the brain at night when body cleansing itself
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Does this study actuallyshow that no one functions well with 5 hours? Or merely that the average person doesn't function well?
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Second one. People who slept 6 hours or less did more mistakes http://and.got more wrong as compared to those who slept more.
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"Some" cognitive abilities suffer. Like long division. Which gives other cognitive abilities an opportunity to rise to the surface without competing noise. Like deep contemplation and sorting out priorities. Nobody can contemplate during a ping-pong game. You dig?
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“Short sleepers” are a small, unique subset of people who show no negative health consequences of sleeping for less than 6 hours a naught. The study linked by Pinker doesn’t seem to take these people in to account.http://grantome.com/grant/NIH/R01-NS072360-05 …
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“Short sleepers” are supposedly 1% of the human population and this study linked by WSJ doesn’t seem to take these people in to account. They appear to be simply lumped in with anybody who sleeps less than 6 hours a night. These people need special consideration, they are unique.
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Omg so glad to hear this. I need 7 to 8 hours, or I just won't be myself, and I always was down on myself cause I feel like I sleep too much.
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I've been battling insomnia for 40 years. There is no way to "tough it out" - you need the sleep, and if you don't get it, you act like early Alzheimer's. People treat you like an addict for needing Ambien. Fuck them. Take it and get some sleep.
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And yet their results don't fit with the experience some of us have. When Data and Anecdote don't match up, rerun the data. It's rather simple to understand. Or should be. Too bad so many people have a hard time getting to grips with this universal truth.
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Maybe your lack of sleep hinders your ability to accurately assess your mental performance?
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Except I don't lack any sleep. I sleep for as long as my body and mind require, and that is as long as I stay asleep for. If that happens to be 3, 6, 9, 12, 15 or even 18 hours, then I sleep that long. I sleep until I am not tired.
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