Should we go to sleep before midnight?

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    Feb 17, 2012 2:44 PM GMT
    A guy at the gym told me he heard that human growth hormone (?), which helps build and recover muscle, increases at midnight to repair and grow muscles while we sleep. He said that if you are awake at midnight, you missed it, so the body does not release it because who knows. I don't know the story. The point is to be sleeping before midnight, say go to bed at 11:00 PM or so because of this.

    Is this right? Should we go to sleep before specifically 12:00AM?
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    Feb 17, 2012 3:28 PM GMT
    Somehow I believe that too..my karate master told me so to sleep early roughly by 10 should be in bed..thats one, it helps on recovery and then the growth hormone helps in your overall well being, and than a doctor said especially those in their early teens wants to grow taller, sleep accordingly as the human biological clock.

    Edit: probably this speaks partly: 640px-Biological_clock_human.svg.png
  • HPgeek934

    Posts: 970

    Feb 17, 2012 3:33 PM GMT
    everyone's body has different internal clocks. My body's midnight might be different than yours. I see what he was getting at, but I think saying 12 midnight strictly is a little far fetched.
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    Feb 17, 2012 4:04 PM GMT
    I think it's about the amount of time, not necessarily when you sleep, if you work work the night shift, and workout in morning, and sleep in morning, I don't think your body knows the difference, because time is relative.
  • jim_sf

    Posts: 2094

    Feb 17, 2012 4:08 PM GMT
    timct saidA guy at the gym told me he heard that human growth hormone (?), which helps build and recover muscle, increases at midnight to repair and grow muscles while we sleep. He said that if you are awake at midnight, you missed it, so the body does not release it because who knows. I don't know the story. The point is to be sleeping before midnight, say go to bed at 11:00 PM or so because of this.

    Is this right? Should we go to sleep before specifically 12:00AM?


    The body clock doesn't obey Daylight Saving Time, or keep pace with Greenwich, so there isn't going to be much difference in HGH production from 11:59PM to 12:01AM. Hearsay is a nasty thing, and I think the guy at your gym has fallen victim.
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    Feb 17, 2012 4:12 PM GMT
    As long as you get your 8 to 10 hours of sleep regardless of the time of day, you'll be fine.
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    Feb 17, 2012 4:18 PM GMT
    jim_stl said
    timct saidA guy at the gym told me he heard that human growth hormone (?), which helps build and recover muscle, increases at midnight to repair and grow muscles while we sleep. He said that if you are awake at midnight, you missed it, so the body does not release it because who knows. I don't know the story. The point is to be sleeping before midnight, say go to bed at 11:00 PM or so because of this.

    Is this right? Should we go to sleep before specifically 12:00AM?


    The body clock doesn't obey Daylight Saving Time, or keep pace with Greenwich, so there isn't going to be much difference in HGH production from 11:59PM to 12:01AM. Hearsay is a nasty thing, and I think the guy at your gym has fallen victim.



    Yea. It's about TIMING. Not about TIME. Not the same thing.

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    Feb 17, 2012 4:19 PM GMT
    DJBoston said
    jim_stl said
    timct saidA guy at the gym told me he heard that human growth hormone (?), which helps build and recover muscle, increases at midnight to repair and grow muscles while we sleep. He said that if you are awake at midnight, you missed it, so the body does not release it because who knows. I don't know the story. The point is to be sleeping before midnight, say go to bed at 11:00 PM or so because of this.

    Is this right? Should we go to sleep before specifically 12:00AM?


    The body clock doesn't obey Daylight Saving Time, or keep pace with Greenwich, so there isn't going to be much difference in HGH production from 11:59PM to 12:01AM. Hearsay is a nasty thing, and I think the guy at your gym has fallen victim.



    Yea. It's about TIMING. Not about TIME. Not the same thing.



    Too bad I rarely get either one right.
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    Feb 17, 2012 4:25 PM GMT
    I've heard the same things from Chinese medicine, that it's the hours you are asleep before midnight that count. Obviously people are growing and functioning adequately if they don't sleep before midnight. However, I think there is something to be said for people being generally sleep deprived, and I believe that going to bed earlier and getting up earlier is good advice for anyone.

    I can't be bothered to link studies, but there is evidence that night shift workers, even if not deprived of number of hours of sleep per day, have higher risk of cancer and other illnesses. Humans are meant to be asleep at night and awake in the day.
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    Feb 17, 2012 4:26 PM GMT
    HPgeek934 saideveryone's body has different internal clocks. My body's midnight might be different than yours. I see what he was getting at, but I think saying 12 midnight strictly is a little far fetched.


    This. Depends on your own circadian rhythm. It's more about the amount and quality of sleep that you're getting than the time you go to bed. If you were falling asleep every night at 2 a.m. and waking up at 6 a.m., I'd say yeah... your body is not getting enough rest to help you recover and build muscle. But if you're going to bed at 2 a.m. and waking up at 9 a.m., I think you're absolutely fine. As long as you get at least 5 1/2 hours of quality sleep per night, your body is getting the rest it needs to function.
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    Feb 17, 2012 4:28 PM GMT
    jim_stl said
    timct saidA guy at the gym told me he heard that human growth hormone (?), which helps build and recover muscle, increases at midnight to repair and grow muscles while we sleep. He said that if you are awake at midnight, you missed it, so the body does not release it because who knows. I don't know the story. The point is to be sleeping before midnight, say go to bed at 11:00 PM or so because of this.

    Is this right? Should we go to sleep before specifically 12:00AM?


    The body clock doesn't obey Daylight Saving Time, or keep pace with Greenwich, so there isn't going to be much difference in HGH production from 11:59PM to 12:01AM. Hearsay is a nasty thing, and I think the guy at your gym has fallen victim.


    I know what you are saying and it makes sense. However, there is a lot of information (saw a documentary on it) about the "body clock." Not sure what to think because it makes a lot of sense, too. I guess we try what works for each of us, though recognizing there are some facts that apply to all or most people.

    The hearsay thing is right also. Of course, that is what we are doing, but it is good to get opinions on topics you heard just from one source. The guy said he heard it from an ipod cast by that long dirty blond haired fitness woman (forgot her name, is opinionated and likes to act tough but is popular for some reason), and a doctor or something like that. I think he said they talked about people who work second and third shifts, too.
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    Feb 17, 2012 4:46 PM GMT
    HPgeek934 saideveryone's body has different internal clocks. My body's midnight might be different than yours. I see what he was getting at, but I think saying 12 midnight strictly is a little far fetched.

    Ditto! I think if you get >8 hours a day, then you'll be fine.
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    Feb 17, 2012 4:49 PM GMT
    Time is not relative or a human construct. There is a reason our energy, moods, etc. correlate with the time of year or time of day. We can remove ourselves as far as we want from nature but we are still, and always will be, a part of nature.
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    Feb 17, 2012 5:38 PM GMT
    "Most hGH is released at night. Peak spikes of hGH release occur around 10 P.M., midnight, and 2 A.M. The logic behind this night-time release is that most of hGH's effects are controlled by other hormones, including the somatomedins, IGH-I and IGH-II. As a result, the effects of hGH are spread out more evenly during the day." (http://medical-dictionary.thefreedictionary.com/Growth+Hormone+Tests)

    "In general, human growth hormone (hGH) secretion follows a circadian rhythm and is secreted in 6-12 discrete pulses per day, with the largest pulse secreted about an hour after the onset of night-time sleep (around midnight for most people)."(http://www.pponline.co.uk/encyc/human-growth-hormone-hgh-901)

    "Generally, our growth hormone release is highest during the first part of the night, which is why getting to bed at a decent time for a good nights rest is so important."
    (http://www.bodybuilding.com/fun/sclark41.htm)

    "The largest and most predictable of these GH peaks occurs about an hour after onset of sleep.[23] Otherwise there is wide variation between days and individuals. Nearly fifty percent of HGH secretion occurs during the third and fourth NREM sleep stages.[24] Between the peaks, basal GH levels are low, usually less than 5 ng/mL for most of the day and night.[23] " (http://en.wikipedia.org/wiki/Growth_hormone)

    I could find only one reference, out of the 8 that I checked, that said the hGH is secreted at specific times during sleep. A few others seemed to hint at it. The rest simply said that it is secreted at intervals after sleep has begun, and did not say you had to be in bed by a specific time. Nevertheless, if one searches more intensively, one is sure to find many more sources to support one position or the other.
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    Feb 17, 2012 5:58 PM GMT
    Now I'm just paraphrasing what I think he might have said: "As I have absolutely no scientific evidence that bolsters my assertions, please just blindly accept my blitherings as fact and gospel."

    You should do your own research and come to your own conclusions.
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    Feb 17, 2012 6:12 PM GMT
    Just don't eat after 12


    gremlin.jpg
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    Feb 17, 2012 6:14 PM GMT
    HGH is secreted in pulses throughout the day and can also be brought on by exercise. A stable schedule is more important than actually being awake when there is light outside. Yes, some neurochemicals and hormones are influenced by light but very few people would be in a position where they never got any sun light at all.

    So, if you are following a circadian rhythm and sleep when you're tired and wake when serotonin stops being produced I don't see why it would matter too much.

    Some of us by necessity have to switch between day and night wake periods (school-social vs working the night shift) and I think that switching is more detrimental than not being in line with other humans circadian rhyhtms.


  • FredMG

    Posts: 988

    Feb 17, 2012 6:23 PM GMT
    Trollileo said
    kandsk saidHumans are meant to be asleep at night and awake in the day.
    Which is stupid.


    Actually, humans, like all great apes, are diurnal (day-active, the opposite of nocturnal). We evolved that way, just facts, science and stuff. Just had to say that 'cause I've been to Ellensburg the "ultra red" part of Washington, and didn't know if they actually had science there.
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    Feb 17, 2012 6:26 PM GMT
    Trollileo said
    kandsk saidHumans are meant to be asleep at night and awake in the day.
    Which is stupid.


    I always do what evolution tells me. Thats why I keep my club and loincloth at the ready in case I need to go out and hunt for food. Then after spending all day hunting, go to sleep after I have sex with all the women around me. Then wake up and do it all again!

    It could happen.
  • FredMG

    Posts: 988

    Feb 17, 2012 6:36 PM GMT
    adam228 said
    Trollileo said
    kandsk saidHumans are meant to be asleep at night and awake in the day.
    Which is stupid.


    I always do what evolution tells me. Thats why I keep my club and loincloth at the ready in case I need to go out and hunt for food. Then after spending all day hunting, go to sleep after I have sex with all the women around me. Then wake up and do it all again!

    It could happen.


    Marry me, I can make sharp things out of rocks and fire without matches. We'll live the good life like the other two kinds of chimps, wake up fuck, gather food, fuck, groom, fuck and go to sleep, the way evolution intended ;)
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    Feb 17, 2012 6:41 PM GMT
    FredPDX said
    adam228 said
    Trollileo said
    kandsk saidHumans are meant to be asleep at night and awake in the day.
    Which is stupid.


    I always do what evolution tells me. Thats why I keep my club and loincloth at the ready in case I need to go out and hunt for food. Then after spending all day hunting, go to sleep after I have sex with all the women around me. Then wake up and do it all again!

    It could happen.


    Marry me, I can make sharp things out of rocks and fire without matches. We'll live the good life like the other two kinds of chimps, wake up fuck, gather food, fuck, groom, fuck and go to sleep, the way evolution intended ;)
    Can I get in on this? I can BBQ the fuck out of a Woolly Mammoth! icon_evil.gif
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    Feb 17, 2012 6:45 PM GMT
    Ariodante saidJust don't eat after 12


    gremlin.jpg




    2iafj2c.gif
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    Feb 17, 2012 7:06 PM GMT
    I think it has more to do with going to bed at around the same time every night. I notice I feel crappy if I stay up a few hours later and sleep in on a weekend.

    No evidence or scientific studies from me this time, just my anecdotal report icon_smile.gif
  • mizu5

    Posts: 2599

    Feb 17, 2012 8:41 PM GMT
    For most of human history, we had 2 sleeps at night with a break in between, so... I don't think so.
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    Feb 17, 2012 9:08 PM GMT
    Night is the best time to sleep.