I know the brain needs 45 min to shutdown and rest but the body send signals to the brain tells the body needs more time. So if there is any way to do that please tell me?
203849
Yes I used to do it all the time in Dental School during finals.  But you need to find the time to take about two or three naps during the day 30 minutes or so.
165140
this is the best i found!\ninteresting discussions.\nApparently, the brain is short of oxygen and looses its functional ability.what really happens: you will have to check out the websites and see!\nthe first link takes you to other various links on this matter.\nthe second link gives detailed diagrams with explanations.
618331
To answer this question you need to understand the sleeping stages.\nMany people think of their sleeping bodies as if they were cars parked for the night--motionless, engines off, headlights dimmed. But sleep is an amazingly complex state of being. As we sleep, muscles tense and relax. Pulse, temperature and blood pressure rise and fall. Chemicals crucial for well-being course through the blood stream. The brain, like a Hollywood director, conjures up fantastic stories, complete with a plot, characters and action. \n\nYou don't simply "fall" asleep. You descend slowly through different levels. As you close your eyes and drift off, you enter the first stage of what is called quiet sleep. Your brain produces irregular, rapid waves, and muscle tension decreases. You breathe smoothly, and mundane thoughts float through your mind. If roused, you might jerk awake quickly and deny that you'd slept at all. \n\nIn stage 2 of quiet sleep, your brain waves become larger, punctuated by occasional sudden bursts of electrical activity. You've definitely crossed the border between wakefulness and sleep. If someone lifted your eyelids gently, you wouldn't waken; your eyes no longer respond to stimuli. \n\nAs you descend into stage 3, your brain waves become slower and bigger. In this state of deep slumber, your bodily functions slow down even more. Finally stepping into stage 4, you reach deepest sleep, the most profound state of unconsciousness. On an EEG (electroencephalogram), your brain waves would appear extremely large and slow. You are so "dead to the world" that a thunderstorm might not wake you. \n\nThis step-by-step journey into oblivion usually takes more than an hour. Then you begin to climb upward, moving rapidly through the same sleep stages as before, not all the way to full wakefulness but in active sleep. Because the pupils dart back and forth, this stage is called Rapid Eye Movement or REM sleep. (The four stages of quiet sleep are often referred to as non-REM or NREM sleep.) \n\nDuring REM, your brain waves resemble those of waking rather than of quiet sleep. The large muscles of your torso, arms and legs are paralyzed, although your fingers and toes may twitch. You breathe quickly and slowly, the flow of blood through your brain accelerates. REM sleep is the time of vivid dreaming, and if wakened, you'd probably recall a fragment of a fantasy. \n\nAfter about ten minutes in REM sleep, you descend the sleep staircase again. The entire cycle of REM and NREM stages takes roughly 90 minutes. Early in the night, the periods spent in the deepest stages of quiet sleep are longer. In the second half of the night, REM sleep predominates. By morning, you go around the sleep circuit four or five times. \n\nThis pattern changes gradually throughout life. From infancy to adulthood, REM periods dwindle to less than a quarter of a night's sleep. By their thirties, men spend less time in the very deep stages of NREM sleep. Women begin to sleep less deeply in their fifties. By age 65, both sexes spend half as much time in deep sleep as they did when they were 25. The lighter sleep stages increase later in life, and REM shrinks to about a fifth of total sleep time.
205384
You are doing pretty well to go 30 minutes.  To go longer just keep trying, you will have a breakthrough and go longer.  Perhaps you need a quieter place.  It is very difficult to find silence in the world any more.  Try to relax more, tensions can rise again after a time and bring you out of meditation.  And, try not to think about your "to do" list while meditating.  Good Luck.
93674
Well Sleep is like recharging urself. Take a sleep even if u got chance to sleep for 2-3 hours. So its better to recharge ur self as much as possible rather than not at all. So it is better to take a sleep for 2-3 hours than stay awake......
221295
get 30 minutes of excerize evrday medatate for  10 minutes at least two times a day eat 3 hours B-4 you go to bed and this might sound crazy but laugh n/e time you can it helps you relief stress and unwanted hormones that make you restless
325122
Well, sleep is a period of regeneration.  Sleep deprivation, leads to decrease of brain metabolic activity, weakening of the immune system (i.e. drop in white blood cell count).  And in children the growth hormone is released during sleep.  Generally during sleep the rate of production in cells increases and their rate of protein breakdown decreases. \nInterestingly i can't remember where i read this, but the amount of sleep required for a species depends on their metabolic rate, and the metabolic rate increase as the size of the animal decreases.  So a mouse needs around 18 hours of sleep to regenerate properly, whereas an elephant needs around 3. But don't quote me on those numbers.
340530
Actually, this is a misunderstood myth.\n\nIt sources from 2 misunderstandings.  First, we never use 100% of our brain at the same time (i.e. different activities stimulate different neurons at different times).  And, second, a good portion of our brain (perhaps 60-80%) are connections.  Think of it like an airport hub system, where the hubs allow people to connect to the more remote places where fewer people travel.\n\nAlso, just to back this up from a logic perspective, it really would make very little sense evolutionary wise that 90% of the brain would be wasted. And, in fact, through evolution, our brains have been getting larger, not smaller.\n\nFurthermore, when there are some people who are able to recover from serious brain injuries, it is more driven by new connections being formed, rather than new brain cells being created.\n\nHope that helps explain things.
646340
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
49728
i would try meditation, exercise, improving diet and getting plenty of rest.  you have to start with the basics in order to build up to mental preparedness.  by meditation i would say sitting on the floor (maybe with some pillows) for about 20 min - hour, close your eles and concentrate.  dont let anything distract you and just be relaxed calm and in control.  for the diet i would cut back on excessive loads of sugar and make sure you are getting 3 meals a day with plenty of water.  soda pop would not be something you should be drinking.  for sleep at least 8 hours a night possibly 9.  go to bed regularly at the same time every nite and wake up at the same time.  afer you have done all that then i would start doing some crossword puzzles and suduko puzzles.  also make a concious effort to be polite and communicate properly with others.  none of the whatever's, slang words, ums and's, filler words.  \n\nremember the basics first. \n\nif you are in a situation where you think you might have a medical problem then go see a dr as soon as possible.
60986
I guess it just gives your body time to rest. you organ's don't seam to work as hard so it give's the body time to heal it's self and rest up for the next day. This is just a guess mind you.
456265
lack of oxygen in the brain. it's a signal that you're mind and body are tired and you need to sleep to recharge.
5735
best way to do it for me, have to actually set time aside for studying, like 3 hours.  now, the magic is not to studying for 3 hours at a time.  but taking a 15 min break for every 30 mins of solid studying.  now in the 30 mins, you have to be studying, not getting ready to study, not getting reference for studying, not learning how to study, but studying, on the 15 min break, same thing as above, nothing to do  with studying at all, nothing. dont' think about it til the 15 min is over.  that way you can guarantee yourself 30 mins of super concentration with the reward of 15 mins of break.
138322
It really depends on how many times you go through REM cycles.  You typically should go through 4 complete cycles...from 6 to 8 hours, usually.  Interestingly, the world record for staying up was 11 nights straight and the guy who did it only needed one full night of sleep (14 hours) to recover!  I wouldn't recommend trying it, considering he thought there were hairy worms on his coat...he hallucinated.
439955
GOT A 1 MINUTE ? -use that time to ...\n\n*TIGHTEN  UP.\n contract all your muscles, hold for five seconds then release. This signals your brain to stop releasing stress chemicals. You'll qiuckly feel calmer" Says Michael Mckee, Ph.D.\n\n* HUME A TUNE.\nIt stimulates your body's relaxation response and regulates breathing, slows heart rate and triggers the release of calming hormones.\n(studies show that just THINKING about a song you like can physically make you more relaxed and give you more energy!)\n\nGOT 15 SECONDS?\n\n* TAKE TWO DEEP BREATHS.- Taking a deep, holidng it for one second, then repeating, lowers blood pressure by 10 to 20 pointa! "It also brings oxygen to the brain increasing alertness," says Phillip Miller, M.D.\n\n* STAND UP STRAIGHT.- Taking a moment to improve your posture relieves tension in the neck, shoulders, back and legs, Mandel says. "It automatically relaxes you by increasing oxygen flow to the brain."\n\nGOT 5 MINUTES?\n\n*CHEW GUM. - In one study, college students reported feeling less stressed when chewing gum. "It relieves muscle tension, spreading relaxation throughout the body," says Debbie Mandel, author of -Changing habits.\n\n*FOCUS ON WHAT'S IMPORTANT.- A UCLA study found that reflecting on things that you value most like family or your faith-before a high pressure event lowers cortisol and shuts down stress symptoms like rapid heartbeat and sweaty palms!\n\nGOT 2 MINUTES?\n\n*PINCH YOURSELF.- Squeeze the webbing between your thumb and index finger for 30 seconds. "This is a calming acupuncture point," explains James N. DIllard, M.D.\n\n*THINK OF ONE WORD.- Mentally repeating a pleasing sound relaxes you. Choose any word or sound you like. Stumped? Try "ham-sah," which mimics the sound of breathing.\n\n**TIP!- Carry a small bottle of lavender or vanilla body lotion in your purse; the scent can calm you down anytime you need it!\n\nI HOPE THESE WORK THEY HELP ME ALOT!\nGOOD LUCK! ;D
435819
you shud study in at most 90 miniuts sessions & have brake  then but brake should be  of resonable time . in brake you can have 15 minuts of nap but not more  be ware of this fact.  in next session change the subject.one subject for long time will make you tired. in evening or morning you must have time for activities you like .
671899
This is from the website I listed, There's other tips and advice on \nit.\n\n"If you're always late by a different amount of time -- five minutes sometimes, 15, or even 40 minutes other times -- it is likely that the cause is technical," Morgenstern tells WebMD. "That means you are not good at estimating how long things take," whether it's drive times or routine activities like taking a shower.\n\n\nKeating says she falls into this category. "It's a case of bad planning, of thinking you need less time than you actually do."\n\n\nThe solution, Morgenstern says, is to "become a better time estimator." She suggests keeping track of everything you do for a week or two. "Write down how long you think each thing will take and then how long it actually took." This will help you find a pattern, so you can adjust your time estimates.