Questions tagged [sleep]

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

54 questions with no upvoted or accepted answers
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74 views

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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61 views

How scientists determine how much sleep every particular individual needs?

Is it determined the same way as "healthy" weight? Someone told me that for weight, they do it by measuring a large number of people and see who gets sick and who doesn't and correlate that weight. ...
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141 views

What factors affect sleep propensity?

What environmental and personal factors affect the amount of time it takes to fall to sleep? How can some people go to bed in 5 min where others take an hour? Some factors I’ve thought about include: ...
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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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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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43 views

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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83 views

Does Blue light filters in smartphones really work?

Since this is more of a health related question, asking this here is preferable than other sites. So, does such apps really do not disturb the production of melatonin? Does Blue light filters in ...
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52 views

What is the best way to recover from all-nighters?

Basically I'm curious as to whether or not sleep loss or gain is purely additive. I'm not sure if this is even the right way to phrase this question, so I'll give an example. Say someone stays up to ...
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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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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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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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41 views

Safe way to increase salivation at night/during sleep

While sleeping salivation is usually decreased. If you are sleeping and have a blocked nasal tract (rhinitis, allergies) or just an open mouth you further dry out your mouth. Other causes might also ...
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66 views

How often can we pull an all-nighter until the body is irreversible damaged?

Many jobs in medicine, science, and economy require unsuitable commitment especially for early-career people. This can often lead to extension of the daily work far into the night. Assume a 30-year-...
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69 views

What can reduce physical symptoms of mental exhaustion, when you cannot remove the root cause?

If a person decides to work a mentally demanding job, giving their all to it, and makes themselves exhausted every day, what can they do to prevent/alleviate the feelings of exhaustion which plague ...
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What should be the position of feet while sleeping?

I recently came across this post as I suffer from similar knee pain while hiking downhill or on a run. Also be certain you aren't battling other imbalances of the hips and legs. When you lay ...
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233 views

What is the medical difference between physical and mental sleep?

Today I spent several hours doing hard, grueling, completely mindless physical labor. It's nowhere near my bedtime, but I'm physically exhausted, my back hurts, and all I really want to do is sit in ...
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136 views

Is there any harm in taking a melatonin supplement every night?

I noticed that a bottle of melatonin supplement is labelled "For Occasional Sleeplessness". The use of the word "Occasional" surprised me. Is there any harm in an adult taking a melatonin supplement ...
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66 views

Sleeping position to avoid stressing the lateral epicondyle

How can one sleep in such a way that one avoids stressing the lateral epicondyle of the humerus? I would tend to issue that back sleeping is advised, but is there is any recommended angle for the ...
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1answer
82 views

Is heart rate indicative of sleep phase?

Lately I've been using an alarm clock that determines what phase of sleep you are in (light or deep) so that it waits until you are at a lighter sleep phase before waking you up. It does this by ...
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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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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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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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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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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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182 views

Vitamin C supplements before bed

So I heard that it is not recommended to take the vitamin C supplements before going to bed at night. Is that true, if so why?
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67 views

Can nasal congestion cause fatigue..?

I have had nasal blockage for 10+ years. One nasal would be completely blocked up and the other open and vise versa. It's not allergies, cold/flu as I've tried any and all medications. Recently it has ...
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39 views

Is the feeling of blood pulses a symptom of low blood pressure?

When I go to sleep after a long waking time or when I am about to wake up after not sufficient sleep (or less than 8 hours of sleep) , I feel the blood flow in the back of my head in the form of ...
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65 views

Melatonin to reduce the amount of sleep

I noticed that after taking 1mg melatonin I tend to wake up earlier. Is melatonin a reliable and safe way to reduce the amount of sleep you need? What's a good dose? I am a long sleeper, without any ...
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194 views

Covering head while sleeping?

I cover my head with covers while sleeping. I find difficult to sleep without doing it, I feel like there is not enought dark (thought all lighs are turned off and it's really dark) and I simply ...
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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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1answer
3k views

Sleeping heart rate (minimum) vs resting heart rate

I'm wondering if there is a correlation between these two. A little background: I would ideally like someone to wear a heart rate sensor all day and all night and without any explicit action from ...
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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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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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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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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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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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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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63 views

Australia: Pulse oximeter for overnight sleep study

I'm looking for a pulse oximeter that can record data overnight and display the results on a Mac laptop or Android app. This video describes what I'm after: Oximiter for Blood oxygen testing: Sleep ...
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31 views

Sleep issues when sleeping on back

I've always liked to sleep over my tummy. Now i'm 24 and recently noticed whenever i try to sleep properly on my back at night i feel very stressed the next day, partial sleeps, rolling on bed(even ...
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17 views

How can I evaluate my sleeping habits based on a Fitbit Charge HR (or similar)?

The Fitbit Charge HR allows one to track their sleep by continuously monitoring motion and heart rate. It uses algorithms to infer when its user falls asleep and when they wake. The next morning, ...
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52 views

Teenagers sleeping patterns and parents actions (force or let-go)

My daughter (15 years old) is very active and full of energy until she hits the sac. After five minutes she's out. This represents the perfect behaviour for bedtime process. But, she does this at 1:00 ...
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46 views

What are some potential causes of idiopathic hypersomnia?

I have been using Google scholar to try to find information about idiopathic hypersomnia. I am struck by the fact that no papers even attempt to provide a pathology (or possible pathologies). Clearly, ...
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29 views

How to overcome mental fatigue after long work?

It's a weird and awesome phenomenon I didn't really find much on: Even though our brains burn (probably) as much calories when hard working as when we just hang out, we somehow feel "mentally" tired ...
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71 views

Dehydration after a nights sleep

After a nights sleep I wake up with a headache which is slightly relieve after a drinking water although I still feel tired and fuzzy headed for the rest of the day. The headaches started to occur ...
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65 views

What steps should a person take to heal one's body after pulling an all-nighter?

Regardless of cause (crying baby, hospital emergency, procrastination, insomnia), what steps should be taken to return to their original sleep? Maybe they should try to sleep as soon as possible or ...
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59 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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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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4 views

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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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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88 views

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 ...