Sleep is a naturally recurring state characterized by reduced or absent consciousness, relatively suspended sensory activity, and inactivity of nearly all voluntary muscles. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and is more easily reversible than being in hibernation or a coma.
Questions tagged [sleep]
125 questions
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Do koalas sleep 22 hours a day?
I came across this image on Facebook from the website Learn Something Every Day:
When I searched for a reliable source, I came across several sites of the same kind (OMG Facts, Snapple Real Facts,etc.) but never anything quite authoritative.
Is it…

Borror0
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Does the "4-7-8" method help to fall asleep faster?
The "4-7-8" technique involves controlling your breath for a brief time to encourage falling to sleep faster.
Each number consists of the period of seconds you spend during a certain part of breathing (4 for breathing through nose, 7 for holding…

Aloizio Macedo
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Does Daylight Savings Time lead to an increase in car accidents and work related injuries the week afterwards?
In the segment Daylight Saving Time - How Is This Still A Thing? of John Oliver's Last Week Tonight it is said:
Studies say that there's an increase in car accidents and work related injuries the week after the time change.
Is an increased amount…

Christian
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Playing music at night for babies/toddlers causes or contributes to ADD/ADHD
I've heard that playing music at night for babies and toddlers (i.e. children under 2 years old) can cause or contribute to Attention Deficit Disorder (ADD/ADHD) when they get older.
Is there any truth to, or basis for, this claim?

Brian M. Hunt
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Do humans sleep better in darkness?
Do humans (and I guess also most creatures) sleep better in darkness?

Andy Li
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Are people who sleep on the left side of the bed happier in their job?
According to a 2011 study by hotel chain Premier Inn, people who sleep on the left side are better off than those who sleep on the right side. One of the examples they give:
In fact, 31% of ‘lefties’ love their job compared with just 18% of…

Glorfindel
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Will sleep deprivation kill you faster than starvation?
This article from Time Motto makes the claim that sleep deprivation will result in faster death than starvation.
In the long run, work is not more important than sleep. If you aren’t sure how important sleep is, think about this: You’ll die faster…

March Ho
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Does sleeping in a cold room reduce the risk of diabetes?
According to Elite Daily, there may be some health benefits to sleeping in a room at between 60-67°F (15-19°C)
In particular, they cite Temperature-acclimated brown adipose tissue modulates insulin sensitivity in humans. to claim:
lowering your…

ChrisR
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Do 7 to 12 year olds need 10 to 11 hours of sleep per day?
WebMD: 7-12 Years Old: 10 - 11 hours per day
At these ages, with social, school, and family activities, bedtimes gradually become later and later, with most 12-years-olds going to bed at about 9 p.m. There is still a wide range of bedtimes, from…

Christian
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Does eating cheese help one to fall asleep or have a sound sleep?
Does eating cheese help one to fall asleep or have a sound sleep?
According to Dr. Oz it does:
Cheese and 100% whole grain crackers are your best bedtime-snack bet. The whole grains help produce serotonin. Cheese, like other dairy products,…

Celeritas
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Do memory foam mattresses cause inflammation?
According to a competitor,
[...] the visco memory foam mattress cuts off circulation and increases inflammation.
This is in keeping with my personal experience of inflammation.
Is that just an anecdote and one more dubious claim from a competitor…

Connie
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is inclined bed therapy real?
I have discovered "Inclined Bed Therapy"
They claim is very beneficial
Is this real therapy?
Why are all beds flat (conspiracy)?
Here some claims for the IBT
sleep psychologist, entrepreneur and author Dr. Günther W.
Amann-Jennson noted that both…

manuelBetancurt
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Do women need more sleep than men?
The claim is that women need more sleep than men because they do more multi-tasking during the day.
http://www.dailymail.co.uk/health/article-2528920/Women-DO-need-sleep-men-Multi-tasking-means-brains-longer-recover.html

None
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Does the phase of the Moon affect human sleep patterns?
From The Economist - "Lunacy? People do not sleep easy on nights when there is a full Moon":
And the answer was “yes”, the phase of the Moon does affect human sleep patterns, even when the human involved cannot possibly see the Moon.…
user5582
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Can irregular sleeping hours cause developmental issues for the brain?
It seems to be a common belief (i.e. here) that in order for our brain to rest and grow properly, we need to have regular, maintained sleeping regimes. While there seems to be no doubt that sleeping less than usual, or going to sleep on a very…

josh
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