How much should a person sleep?
How much time is a human being required to sleep?
How many hours of sleep does a kid need? How many hours do successful people sleep per day? Why does your body need 8 hours of sleep? Why do we need eight hours of sleep? How long does one spend in light sleep versus deep sleep? How many hours of focused, detailed work can a person reasonably do in a 24-hour period, before needing sleep? How many hours of deep sleep (delta wave portion) does an average adult need, per day? What is the ideal amount of sleep time that a teenager needs to be healthy? How many hours do you sleep per night? How many hours do you sleep (day & night) per day? For people who wake up at 5 am or earlier, what time do you generally go to sleep? What is best sleeping time duration daily? Would having two 4-hour cycles of sleep (per day) as effective for the body as sleeping 8 hours in a row? Is sleep important? By practicing to sleep for 5 or 6 hours, is it possible to maintain a healthy life style? How many hour students sleep? How many minutes of deep and REM sleep are best? Is 6 hours enough sleep? Is it healthy to sleep for 12 hours a day? Why or why not? How many hours can a person work at most attentively without sleeping? What is the maximum numbers of hours a normal person can stay awake and concentrate on anything without sleeping? Would this make you insomniac forever? How many hours do medical students sleep? Why is sleep so important? Is 6 hours of sleep enough for a 17 year old? Is sleep actually that important? Sleep Habits: What is the least amount of hours of sleep do I need in a working week? How much of a tangible impact will long term sleep deprivation have on me now? Is it unhealthy to sleep for over 12 hours? How much sleep do average teenagers get? Why is it important to get sleep?