Questions tagged [sleep]

Questions about sleep disorders, like circadian rhythm sleep disorders, or the general topic of sleep as it relates to health.

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56 views

Is there a medical problem of too much REM sleep?

I understand that human sleep has a cycle of five stages that can repeat itself several times (depends on how long one sleeps); these are named based on the fifth stage occurring about each 90 minutes ...
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39 views

Is it harmful to the human body if we don't turn off the light completely while sleeping? [duplicate]

While sleeping, some people may leave the light on or dim it down, so that perhaps it is equal to a 35W or 20W regular light bulb. In this case, is it true that the pineal gland in our brain won't ...
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18 views

Convention about using medical cannabis as sleep aid

As far as I have learned, Cannabis products made of the CBD-rich "Indica" species (or sub-species, depends on the botanical opinion), use to combat PTSD, and anxiety and for muscle relaxation in some ...
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70 views

How much Melatonin does the body produce naturally per day?

Melatonin is a supplement readily available over-the-counter. However, the dosage is not regulated and there are a wide variety of doses. Also, information on how much the body is supposed to ...
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Effect of high body fat on sleep and wakefulness?

I have read studies that physical exercise have a positive effect on sleep quality and wakefulness. Are there clear results about the effect of obesity/overweightness on sleep quality and wakefulness,...
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32 views

Is there any medical downside of using a knee pillow when sleeping?

Is there any medical downside of using a knee pillow when sleeping? I have read many webpages that only state the upsides of using knee pillows when sleeping (e.g., https://www.tuck.com/best-knee-...
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Does light pollution affect sleep quality while already asleep?

Many articles on the internet write about melatonin and its effects, making you tired. A lot of articles also point out how the use of devices before going to bed in modern days likely decrease ...
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18 views

What is the effect of still feeling a movement after doing this movement during the day called and what causes it?

After a long day of sailing or a boat, or sitting in a car, or heavy sporting, et cetera, one might feel, while lying perfectly still in bed (or resting in another way), as if the body is still ...
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58 views

How does sleep affect anesthesia? [closed]

Before surgery that requires anesthesia the patient is told stuff like don't eat. Some people cannot sleep well prior to surgery. Can having a full night or regular good sleep fair better for ...
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23 views

Earlier wake-up times in older people

Many studies led to the conclusion that the internal body clock period (circadian rhythm) is actually closer to 25 hours; that is, the clock was thought to drift toward a 25-hour day unless it is set ...
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36 views

Sleep apnea: Which is more reliable, a home sleep study or a lab sleep study?

After some research, I'm aware of two different types of sleep studies that are available to detect sleep apnea and determine its severity: In-home study Lab study Which type of study gathers more ...
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46 views

All nighter: steady sleep schedule or sleepping in

Staying up all night is harmful, but suppose you are in this situation what is the healthiest response. It is hard to find a scientific answer online on the healthiest response after staying awake all ...
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164 views

How much sleep do adults actually need?

The common consensus is that most adults should get 8 hours of sleep a night. However, sleep needs are highly variable, with some people needing more to function properly, and some gaining little ...
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46 views

Which impacts one's sleep more - waking up towards the beginning of a sleep cycle, or the end?

Imagine someone wants to go to sleep at midnight and wake up at 7.30 am, so that they get an ideal five sleep cycles (7 1/2 hours). First scenario: they go to bed at 11.30 and fall asleep within 15 ...
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70 views

Is going to sleeping with socks beneficial or detrimental?

I've recently read this piece: Is sleeping with socks on good for you? from "MedicalNewsToday", and supposedly reviewed by a "PhD, RN". Having moved into a poorly-insulated apartment, and being ...
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43 views

Is daylight savings linked to heart attacks?

I was told this earlier today and a quick search produced the following Reuters report from 2014: https://www.reuters.com/article/us-heart-daylightsaving/daylight-saving-time-linked-to-heart-attacks-...
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Can excessive Vitamin D cause insomnia or damage sleep patterns?

It seems its well known that low vitamin D can cause sleeping issues, one link: https://examine.com/nutrition/can-supplemental-vitamind-improve-sleep/ Therefore, I became curious and was wondering ...
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39 views

Sleeping temperature when suffering from cold

I usually sleep at around 69°F(20.6°C). If the temperature is anything above 71°F(21.7°C), I find it very difficult to fall asleep with my body burning up and all. However, when I am suffering ...
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43 views

Sleep hygiene in a single-room living space

The principles of sleep hygiene in treating insomnia (one example) include addressing the cognitive links between the bedroom and wakefulness - advising that one leave the bed/bedroom if one can't ...
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1answer
62 views

Does a computer screen work as a lightbox?

We often hear two related facts: That using a lightbox can help maintain one's circadian rhythm. That using a computer late a night can make it harder to sleep at night due to the blue light emitted ...
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85 views

Does caffeine have any distinct biological effects to adrenaline?

Adrenaline usually is a "panicking response" and should, as far as I understand it, supresses any feelings of tiredness. However, someone I know has agoraphobia, which when triggered releases a lot of ...
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33 views

Is there a long-term risk to sleeping in a hammock regularly?

There seems to be very little research on long-term health or spine drawbacks to sleeping in a hammock (anything besides individuals informal blog-type posts). Just one study about sleeping in a ...
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1answer
210 views

How does poor sleep cause circles under one's eyes?

I've read that poor sleep causes circles under one's eyes. Also, I've read that they are caused by dehydration. Is it safe to assume that the way poor sleep causes the circles is by causing ...
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1answer
30 views

Why is it harder to get up when forced to wake up?

I only noticed this for quite a while now but never considered it much of a problem but I noted that when I'm forced awake (i.e. someone wakes me up) I feel significantly drowsier versus when I wake ...
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59 views

What are clinically advised methods to improve nocturnal respiration other than CPAP?

Based on conventional medicine, what advice should a physician give a patient who experiences breathing difficulty during sleep that is not determined to require a CPAP machine and for which the root ...
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92 views

Why can't one “catch up on” sleep?

I've repeatedly heard it said by sleep experts that one cannot "catch up" on missed sleep.[citation needed] The best explanation of that statement I've heard so far is that a lack of sleep has ...
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52 views

Why do we sleep? [closed]

I was reading many things about sleep. But I am very curious about knowing why do we sleep. Is it only for trashing out toxic materials or is it anything else?
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50 views

Evening lighting that doesn't work against sleep cycle

I have read that blue light entering the eyes is the channel through which light influences the sleep cycle. (I am not sure if this is correct, please do tell me if it is or if its a myth or an ...
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26 views

Is it good for health to regularly do a nap and divide sleep into two?

I am trying to adapt to biphasic sleep. I would ideally do something like 00:00 - 06:30 and a nap from 15:30 to 17:00 (Or the sleep amount that I require to fulfill my sleep needs). I have been ...
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37 views

Normal Sleeping Heart Rate Range

I recently got a heart rate tracker and I've noticed that when I sleep my heart rate consistently spikes fairly high. It has reached 165 bpm before, but most times it's under 150. That seems a bit ...
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106 views

Coffee for solving sleep problems?

In this post I asked whether Coffee use could cause an increase in adenosine levels as a result of the body’s adjustment to lower adenosine receptor activation. An answer stated that coffee use ...
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32 views

Why do teenagers produce their melatonin later than everyone else

Does anybody have a theory why this change happens to teenagers? Everything I have read agrees it does happen, but nobody seems to suggest a reason why this has evolved. Biology’s cruel joke goes ...
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1answer
61 views

Does caffeine boost adenosine buildup?

Caffeine blocks adenosine receptors, thereby reducing the effect of adenaline. It seems plausible to me, that blocking adenosine receptors should (perhaps ironically) increase the rate of adenosine ...
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1answer
151 views

What is the medical term for paralysis while sleeping?

What is the medical term for the natural paralysis that occurs while a person is in REM sleep? I look it up online, but I only find sleep paralysis which is a misnomer as that actually happens when ...
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89 views

When should we sleep?

Is sleeping every day from 4 am to 10 am is equivalent to sleeping from 12 to 6 am at night? Also, what is the best time to go to sleep at night? And how many hours of sleep is necessary for good ...
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20 views

What are the effects is a person has a regular amount of Deep Sleep and REM sleep but a lot less Light Sleep?

It's commonly said that it's important that we get enough total sleep time. I however wonder how important the time in Deep Sleep and REM happens to be. What are the effects when a person has a ...
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54 views

When working graveyard shifts, is it possible to sleep well and stay healthy?

Shift work is known to be harmful to our health. Are the health effects actually avoidable? Some companies need shift work which means some people have to do shift work. Have people successfully ...
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99 views

Relationship between sleep deprivation and itchiness

Obviously, itchiness can cause sleep deprivation to human as shown in many clinical cases. But I want to know if a sleep deprivation can cause itchiness or at least confuse our brain of spotting itchy ...
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35 views

What effects can be expected for a 15-year old girl getting 4-5 hours of sleep per night? [closed]

Say a 15-year old girl on average falls asleep around 3am and wakes up around 7am, over a very long period of time. What short-term and future mental/physical effects can be expected?
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56 views

Is it possible to “sleep” while aware and cognizant?

I have a scenario, but before I begin, I would like to clarify that this is not Sleep Paralysis, nor Lucid Dreaming, nor what I understand a Trance to be. Let's say that someone decided they needed ...
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28 views

How effective are digital blue-light filters for secretion of melatonin & getting to sleep?

Programs like f.lux (Desktop Application) and features like Night Mode (iOS) claim to reduce the blue light being emitted from a digital screen to improve sleep. Is this true, and if so, how effective ...
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26 views

Authoritative Source on Sleep Requirement

What is the hours of sleep required for someone over 70. My Dads Dr (Internal Medicine) said at least 5 hours, yet Internet sites say 7 to 8. Which Internet site is authoritative source for sleep ...
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27 views

How can I avoid snoring when not sleeping at home?

I have the nasty habit of snoring quite loudly while sleeping. At home, I have a special pillow that reduces my snoring by about 90%. Now I am travelling abroad, and forgot my magic pillow. This is ...
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38 views

Effectiveness of blue light filters for preventing delayed and decreased melatonin secretion?

The iPhone offers a "night shift" feature. Research indicates that blue light exposure decreases melatonin secretion (e.g., Ferguson, Melton, Li, Park, & Tosini, 2008). To what extent do built-...
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33 views

GAD67 Effect on Sleep

Glutamate decarboxylase enzyme converts Glutamate into GABA. Also increase in gaba levels decrease gad activity! why does increased gaba levels decrease GAD activity?
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1answer
47 views

Prevention of numb limbs caused by sleep posture

About a month ago I woke up to my right arm completely numb forearm onwards. It was completely dead and I could swing it around. It took a few minutes for it to come back alive and I didn't care about ...
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29 views

how to stop wrinkles on face when sleeping on stomach

How to stop wrinkles on face when sleeping on stomach ? or Is this a myth that we get wrinkles if we sleep on stomach ?
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What is sleep pressure?

What is sleep pressure? I was reading an article on melatonin, and one of the commenters said something about 'sleep pressure'. I did a web search to see what it was, but web searches don't often ...
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107 views

Why do I feel dehydrated when I wake up very early? [closed]

Occasionally I have to get up very early for flights, surveys etc and only get a couple of hours sleep. As soon as I wake up, my throat feels completely dry and I am extremely dehydrated. The only way ...
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87 views

Sleeping 6 hours discontinuously every day

During the last year I think the 90% of the times I can't sleep for more than ~4.5 hours continuously (which corresponds to ~3 cycles), then I'm awake for ~30 minutes trying to sleep, but if I fall ...