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 ...
11
votes
0answers
391 views
Is sleepiness after a goods night's sleep a sign of dehydration?
If you still feel tired after a good night's sleep, you're probably dehydrated. Drink some water after you wake up.
— Just So You Know (@Know) April 22, 2013
Some quick searching ...
0
votes
1answer
87 views
Does Excessive Menthol Cause Sleepiness
Does Over Consumption of Menthol Cause Sleepiness?
I found no substantial sources either to suport or refute this argument. I have heard it from a few sources not perfectly reliable.
I do know that ...
10
votes
0answers
286 views
Do adults sleep better when they sleep alone?
Newyorker: Research studies consistently find … that adults “sleep better when given their own bed.”
Is that an accurate assessment? Do adult sleep better when they sleep alone rather than with ...
3
votes
0answers
107 views
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 ...
6
votes
0answers
959 views
Are intelligent people more nocturnal than people not considered intelligent?
Some sites claim that people with higher intelligence tend to go to bed later.
For example:
People with higher IQs are more apt to be nocturnal night-owls. Those with lower IQs tend to restrict ...
1
vote
1answer
251 views
Why does small amount of night time sleep makes a person more tired when he wakes up? [closed]
Assume that you go to sleep at 0:00 am and wake up at 3:00 am.
Why do you feel more tired (compared to your tiredness at 23:59) when you wake up at 3:00 am? Why does sleep makes us more tired in this ...
11
votes
1answer
678 views
Do memory foam mattresses help reduce back pain?
Memory foam and related products have claims like
TEMPUR Mattresses create a custom fit for your body, virtually eliminating painful pressure points and reducing your body’s need to toss and turn ...
7
votes
0answers
274 views
Is there any correlation between sleeping position and personality?
I've read in various news sites (1, 2, 3) that sleeping position correlates with personality. Most go as far as describing what personality traits are linked to each different position but no mentions ...
6
votes
1answer
2k views
Do bullfrogs sleep?
Today I came across this picture:
So I searched a bit about it. In this wiki answer it is stated that:
Bullfrogs do sleep. They sleep underground from 2- 4 weeks.
Sounded ok, but in this ...
-1
votes
1answer
345 views
Is sleeping on airbeds unhealthy?
I have often heard from people that sleeping on airbeds is not good for health, reasoning that it is filled with air and molds to the shape of our body, so cannot provide enough support for the back.
...
0
votes
0answers
57 views
Is there any devices or software to prevent Sleepwalking (Somnambulism)? [closed]
I have problem with sleep walking.I am 23 year old.I heard about that some software or devices can track the sleep cycles.Is there any devices or software to prevent from sleep walking?
7
votes
0answers
708 views
Does taking cold baths before sleeping help you sleep better?
Recently I heard in some gyms with saunas that if you go to the sauna and then hop in a cold shower you can have a great night of sleep after.
I saw it in the Four Hour Work Weekblog:
Japanese ...
16
votes
2answers
963 views
Is “co-sleeping” (infant sleeps in bed with parents) safe?
Among some circles, co-sleeping is highly advocated for newborns/infants due to ease of breastfeeding and potential developmental bonding to the mother (for more examples, read about proposed ...
10
votes
0answers
341 views
Which position is healthiest for sleep?
If you believe the internet, there is no healthy way for you to sleep: front, back, side, fetal; they are all going to cause you problems like acid reflux, spinal problems, skin problems, problems ...
3
votes
1answer
573 views
Is the best way to fall asleep by trying to stay awake? [closed]
In the movie Saving Private Ryan, the soldiers are discussing how difficult it is to fall asleep, when one of them suggests that the best way to fall asleep is to try to keep yourself awake. He then ...
42
votes
3answers
3k views
Do we need 8 hours of consecutive sleep a day?
It is said that an adult human needs around 7-9 hours of sleep per day.
Do human beings need around 8 hours of consecutive sleep a day? Is it prejudicial to the body and brain that you don't? Or is ...
0
votes
0answers
34 views
Does taking a nap (or going to sleep) right after eating cause one to gain extra weight? [duplicate]
Possible Duplicate:
Does having late or heavy dinner make you fat?
If I were to eat dinner late and go to sleep right afterward for an extended period of time, would I gain more weight than ...
8
votes
0answers
284 views
Does oversleeping lead to reduced alertness?
There are several studies (Example 1, Example 2) about the effect of sleep deprivation on alertness and cognitive performance.
Are there any studies investigating the opposite - The effect of too ...
10
votes
2answers
500 views
Can Software Help You Sleep?
I've come across software that claims to improve one's sleep and to help falling asleep in the first place, by listening to an audio track with spoken words, music, and ambient sounds. Here's one ...
9
votes
0answers
337 views
Has hypnopaedia been proven to work? To what extent?
The idea of learning during sleep, say by listening to a recorded class, can be tempting to make a good use of roughly a third of the day. Has it ever worked though? If so what is the most efficient ...
8
votes
0answers
473 views
Does sleeping on your left side, while pregnant, improve blood flow?
According to babycenter.com and countless other pregnancy sites and youtube videos, women should sleep on their left side while pregnant to improve blood flow to the fetus:
Sleeping on your side ...
23
votes
1answer
3k views
Do side sleeping postures contribute to breast sagging?
CNN claims that sleeping on your side and sleeping on your stomach can lead to saggy breasts.
Sleeping on your side can cause you to get wrinkles," Glaser says. Blame all that smushing of one side ...
8
votes
1answer
481 views
Is it possible to drive while sleepwalking?
I recently watched a movie called In My Sleep where the character allegedly is able to drive and even have sex while he is "sleepwalking."
Marcus struggles with parasomnia, a sleepwalking disorder ...
8
votes
0answers
2k views
Can you snore and dream at the same time?
According to numerous sources on the internet, you cannot snore and dream at the same time.
Source 1
If you are snoring, then you cannot be dreaming. This fact is repeated all over the ...
4
votes
0answers
221 views
Do heavy meals within two hours of sleeping interfere with rest?
The claim is that if you eat a "heavy" (i.e. animal fats and processed foods) shortly before going to sleep, then your sleep will be less restful and you wake up groggy.
Example of the claim:
If ...
2
votes
0answers
355 views
Is there evidence that you feel more tired two days after getting little sleep? [closed]
I've experienced this at times personally but not consistently, though I'm sure it depends on how much sleep is gotten the second night. Others have also shared anecdotes that there is indeed a one ...
7
votes
1answer
674 views
Does using the computer before sleeping affect sleep patterns?
According to this Bloomberg Businessweek article using electronics before bed may hamper sleep.
Is it true that using a computer, watching T.V. or using some other type of face-to-screen electronics ...
11
votes
1answer
651 views
Is it dangerous to wake a sleepwalker?
Source
It seems to be a common belief that you should
never wake up a sleepwalker
From Wikipedia - Sleepwalking:
There are conflicting viewpoints on whether it is harmful to wake a ...
11
votes
1answer
772 views
Has lucid dreaming been scientifically observed?
I found this anecdote in Surely You're Joking, Mr. Feynman! by Richard Feynman. In the passage below, Feynman describes his attempts to analyze his dreams
I also noticed that as you go to sleep ...
7
votes
1answer
1k views
Do sharks never sleep?
My friend was saying that shark never sleeps. Because to keep it afloat, it has to continuously swim, so that it can't sleep.
This claim is repeated in the Ocean of Know:
They certainly need to ...
6
votes
1answer
2k views
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 ...
24
votes
0answers
13k views
Did Albert Einstein sleep 10-11 hours daily?
I heard many times that Albert Einstein needed a lot of sleep. For example, this BBC article claims that he typically needed eleven hours of sleep:
People's sleep needs can differ significantly.
...
17
votes
2answers
605 views
Are there people who can naturally and sustainably function with much less sleep than average?
Over the years I've heard many claims of the ability to have very little sleep every day, sometimes including weekends and vacation, and be highly functional at work. Most recently these claims showed ...
20
votes
2answers
1k views
Does learning immediately before going to sleep increase the effect?
I have read now several times as a "secret tip" that learning directly before going to sleep significantly increases the effectiveness of learning, probably the long-term memory when, for example, ...
7
votes
1answer
415 views
Do lone sailors alternate between short period of sleep and awareness?
An unsourced claim on Wikipedia is that single-handed sailors only sleep one hour at a time:
Most single-handers use the technique of napping for 15 to 20 minutes at a time, using a timer to wake ...
5
votes
3answers
2k views
Is shared dreaming possible?
Mutual dreaming or shared dreaming is the claim that two or more people can share the same dream environment. I have experienced a numerous lucid dreams but I've never met a known person in such ...
8
votes
0answers
512 views
Is there a connection between sleep patterns and meat-eating?
There are a number of different and sometimes contradictory claims that changing your diet (especially with regard to avoid meat) can have an affect on your sleeping pattern.
Here are a few related ...
8
votes
1answer
577 views
Can you tell if you're dreaming by pinching yourself?
Just yesterday I read how Tyrion tries to figure out if he's sleeping by pinching himself. And this seems to be a commonly held truth which often comes back in tales.
But I'm not so certain. So can ...
8
votes
2answers
3k views
Does putting a bar of soap under your mattress prevent leg cramps?
I've heard this claim several times from family members, and I was highly skeptical. Supposedly the mere presence of a bar of soap underneath the mattress can ward off leg cramps during the night. ...
16
votes
2answers
16k views
Do memory foam mattresses give off toxic fumes?
I recently purchased a memory foam (polyurethane) mattress and was looking online to see how long they take to "air out". They produce a strong odor for awhile after manufacture. However, instead of ...
26
votes
2answers
7k views
Is it better to sleep before midnight?
My father and I couldn't be more different when it comes to sleep. I rarely go to bed before midnight, while he will often retire around 9:30. While growing up, we'd often get into discussions on the ...
20
votes
1answer
3k views
Do mattresses double their weight after 10 years?
I've heard this story for years: After you bring a mattress home, dust mites move in (possibly even before). Like all creatures, they create waste products, which allegedly accumulate over time. The ...
27
votes
1answer
2k views
Can devices detect your sleep cycle and wake you in a more refreshed state?
There are a number of products on the market that claim to be "better alarm clocks" that allows you to feel more refreshed when you wake - even if you sleep a few minutes or tens of minutes less.
...
28
votes
3answers
769 views
Were our ancestors segmented sleepers?
Historian A. Roger Ekirch contends that in ancient times, people naturally had two sleeping periods at night- the first starts shortly after sundown and ends in an short break, where people were ...
12
votes
2answers
1k views
Do dreams have meaning? [closed]
There is obviously a spectrum of suggested dream interpretations. I am not interested in the concepts that dreams have some supernatural component that we can filter out with prayer and study. What I ...
14
votes
3answers
2k views
Does caffeine later in the day affect quality of sleep?
My wife is often telling me that drinking coffee later in the day will lower my "quality of sleep." Is this so? For an example of a bit beefier of a source for this claim, consider THIS blog post, ...
4
votes
1answer
991 views
Does “not drinking water” help you sleep better?
Recently I had been seeing some websites that suggest not to drink anything before going to bed. One of the reasons is to prevent waking up feeling want to pee. And it disturbs your sleep. But I feel ...
23
votes
1answer
3k views
Do teddy bears help people go to sleep better?
There are so many kids in this world who go to sleep with teddy bears and dolls. It seems like they need these toys to go off to Dreamland.
I just recently realised this because my own child, about ...
5
votes
2answers
474 views
Can a hypnosis audiobook induce epileptic seizures?
I noticed a warning on a hypnosis/self-help audiobook that read as follows:
Warning: This audiobook contains
powerful techniques. Do not listen if
you suffer from epilepsy.
My inclination ...
11
votes
3answers
927 views
Is sleep training a form of neglect or harmful?
Some people claim that "crying it out" is harmful. For example, the article on PhD Parenting states that crying it out is harmful to a child. I've heard others suggest that it's neglectful. I expect ...
