How long can a person go without sleep?
538646
A long time, but you don't want to risk it.  There was something I read about some guy who tried to make some record - he did like 11 days.  By the end, he was hallucinating and talking complete gibberish.  Then again, I've read stories of overweight people who dropped dead from heart attacks due to prolonged lack of sleep.\n\nI can tell you, in terms of actual lack of sleep, I've pulled I think close to 72 hours (in between 2 and three days, I can't remember now), and started to hallucinate a bit.  It's also happened when I've done 3-5 hours a night every night for about 6 weeks.  It's a really bad idea, and was incredibly stupid.  It's not good to do unless you absolutely have to, when there's no other choice.  It's better to stop whatever work you're doing and get your sleep - it's not worth risking your health, and even life, over.
1136626
Not enough in general. We need good six hours sleep .\nAlso your age sex your physical conditions the type of work , all play a role. How can I pilot or driver be continuously exposed to short periods of sleep and endangering the life of many.\nIf you are enjjoying holidays and watching WORLD CUP FOOT BALL MATCH DAILY LATE IN THE NIGHT AT PLACES LIKE ASIA then less sleep, intemittent sleep during night and a day time nap is ok. You cant help it. We get to watch such matches once in four years and there is thrill in watching LIVE not recorded and replayed
118982
The most anyone can sleep is most definitely NOT 8hrs. I have had friends who slept for 24hrs straight. It all depends on how much of a "sleep deficit" you have. \nYour body needs a certain amount of sleep, and that differs for everyone. However, it is recommended that we get around 8hrs per night if we are to function at our best. \nSleep is important for many reasons - helps with "solidifying" your experiences and memories that you have from the previous day, recharges you with energy - I think it's pretty obvious. \nAbout the day vs night sleep? It is best to sleep during the dark hours because the production of MELATONIN - a hormone that regulates sleep-wake cycles - varies with exposure to light. \nI also happen to be "nocturnal", but this is causing me a lot of problems. I cannot imagine how it would feel like to wake up feeling refreshed before 11am!
179026
I once met a monk who trained himself to stay awake for 3 weeks, but he technique was different than what you are asking. He was using meditation to change consciousness instead of sleep, but he could stay awake for 3 weeks. It was a very painful training to get there though.
1116997
First of all, 10 hours a day is a bit much in the first place.  Average human beings require 8-9 hours per night, and many health professionals warn against less than 7, so I would NOT recommend you sleeping just 6!  However, many, many people sleep 6 hours or even less, despite the dangerous health problems they risk, so it depends on your motives: what could possibly warrant starving yourself of sleep?
1112984
According to studies, minimum rest/sleep time must at least be 10 hours a day... If you don't, it might impair your judging abilities and affect harshly on your work... Also you are easily irritated if you lack sleep... 10 hours a day man... prioritize your own health rather than your job...\n\nHope this will help you...
307633
Most people recommend at least 7 1/2  to 8 hours.  It depends also how old you are, sometimes older people get by with less sleep.  Look at it this way, if you get a certain amount of sleep then wake up, and you still feel like crap, you need more sleep.  Most important too is if you wake up in the middle of the night, DON'T look at the clock, it will psyche you out and you won't fall back asleep as fast.  Also try to go to to bed and wake up at the same time every day, or at least don't vary the sleep/wake up times by more than 2 hours (for example if you normally get up at 7am, don't sleep in longer than 9am, regardless of the time you went to bed), that's the maximum difference your body can take. Also don't drink ANYTHING closer than 3 hours before you hit the sack.
387686
After pulling 36-hour shifts without any sleep, I've slept longer than 24 hours. Felt miserable afterward, too!  Catch-up sleep is not that great.
889753
yes you can but it sucks.........your brain re charges after 4 hours of sleep, the other 4 are for your body, but your body can function on a half charge, so if you sleep roughly 4 hours a night that's all you really need to keep from getting nerve disorders and shit like that witch will kill you, Ive heard that a person will die if they go more than 4 days straight with out sleeping. Also, I dint know how long they would go but I have heard the Nazi's would force Jewish prisoners to work until they died from exhaustion.  \n\nI myself have conditioned myself to the point that I could stay awake while driving after 4 and a half hours sleep each night for a week, but the tax it in poses on the body is not cool. After about a year and a half I became allergic to the sun, doc. said that it was because one of my origins was increasing the out put of some long named chemical that I cant pronounce or come close to spelling, all thanks to a lack of sleep. my doc. recommended at least 6 hours of sleep each night, I sleep 6-7 hours and stay healthy
358995
About four or five days. After that, he starts to hallucinate if forced to stay awake and if not forced to stay awake he will just fall asleep.
329421
That is enough sleep for adults.  Children need more, 8-10 hours.  When adults sleep more than 8 hours it is actually bad for their bodies.
170509
A typical adult will need an average of 8 hours of sleep to remain healthy. Some may be ok with 6-7 hours, some may need 9-10 hours. Most people will be between 7-9 hours. You should, as a practice of good sleep hygiene, go to bed and wake up at the same time daily. The body's circadian rhythm is naturally set to sleep at night, not only by the effects of sunlight (internal clock in near the optic chiasm an area in which the optic nerves of the eyes cross), but also by the varying core temperature of the body. The core body temp drops during the afternoon, which is why most people get a little tired after lunch and some cultures actually observe naps during that time. Then the core body temp starts plummeting after 7PM and hits the lowest around 3AM which is when you will be the most tired naturally, even if you are a night worker (which is why many shift workers suffer poor sleep). People who "claim" that 4 hours is enough for them are kidding themselves, the body simply can't recoup in that short of time and many people sleeping that little actually have a sleep disorder that keeps them from getting good sleep. Lack of good sleep and sleep deprivation can lead to a host of very bad things health wise up to and including death. Feel free to look over my previous sleep related question for the full dose of sleep disorders, diagnosis, and treatments. \n\nPersonally, I like about 7 1/2 hours of sleep; I go to bed between 9:30 and 11:00 most nights and wake up between 5:30AM and 8AM depending on weekday vs weekend.\n\nSleep tight ;)
863947
Adult requires a minimum sleep of 6 hours a day, sleeps will seriously effect your health in a very big way, if you do not get enough sleep, your anxienty, stress level will increase with ease, your mind will not think properly and also that your health will deteriorate extremely fast. so please try not to sleep at the minimum of 6 hours, get a healthy 8 to 9 hours. \n\nIn Korea this guy died of being awake for 50 straight hours playing online game. A few cases has happend already. so Take care Cheers
208248
8 hours. how long did YOU sleep for the day?
38672
i sleep about 6 hrs at night. if you look into it people who sleep all day dont have much of a life. there wasting there day but about 7-8 hrs a day. scussful people dont sleeep all day their also more healthy than those who do sleep alll day
556867
That will depend entirely on what your thesis research involves.  If you are limited by library hours, or laboratory hours and experimental growth delays, it makes a big difference.\n\nIf you've got enough caffeine and enough limited access to your facilities it is possible to remain awake for 5 to 6 days without sleep, but I don't recommend it.
6850
The record for the longest period without sleep is around 19 days.