by 
joefbs
ANSWERS: 5
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By how much. Everyone's body needs a certain amount of rest. Not sleeping enough will can cause both physical and mental problems.
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The theory is, 8 hours is the optimum amount of sleep per night. To be honest, that's just a bad civilian habit. Soldiers regularly go without sleep for extended periods of time, however, this is due to adrenaline mixed with necessity and adaptation. You can train your body to go without any sleep for several days, however it will catch up with you, and you MUST allow recovery time. To go with less sleep, you simply get up earlier, and get on with it,. It'l take a bit of time, but your body will adapt to the new conditions you set it.
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You can, and I did years ago. Trust me though, it will mess you up. Once you adjust, it's very difficult to unadjust. And it is not something you want to do for an extended period.
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You can do that, yes. But you do need to allow sleep time. You can stay awake all you want, drink tons of coffee and take pills to keep you awake, but eventually your body will crash right where you're standing and force you to sleep.
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there are many polyphasic sleep patterns that result in less sleep time from 2 to 6 hours. I've personally used uberman method with success several times and always longer then 2 months. you sleep only 2 hours a day with that one.
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