How much deep sleep do I need?
How much sleep is too little, too much, and just the right amount?
How important is sleep? How many hours of sleep does a kid need? I am 16 year old. How many hours should I sleep? I have been sleeping for 4 hours a day apparently, is it normal? Is 6 hours of sleep enough for a 17 year old? Is sleep important? How do I avoid sleep so much? What are some tips for making the most of your Sleep No More experience? How much should I sleep as a teenager? How many hours do you sleep per night? How can you max out REM sleep? How many calories do I burn while sleeping? Why do we need eight hours of sleep? I sleep only 4 hours. I try to sleep more but I can't. What's the minimum hours we should sleep? What's the ideal ratio of light, deep, and REM sleep? How many hours of focused, detailed work can a person reasonably do in a 24-hour period, before needing sleep? Why is sleep so important? Is 7 hours of sleep enough for a 15 year old boy? Is sleep actually that important? What's the best way to get sleep? Why does your body need 8 hours of sleep? Do people who need less sleep get a higher percentage of REM or slow-wave sleep? How can I decrease the amount of sleeping? How can I reduce my sleep? How many hours do you sleep (day & night) per day? What is the healthiest way to sleep? Is sleep more important than food? What is the ideal amount of sleep time that a teenager needs to be healthy? How many hour students sleep? Is a Sleep Number bed worth the cost? Can a 3 month old baby sleep too much?