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New Study Finds How Much Sleep Fitbit Users Really Get

Fitbit has published the results of a study that uses their longitudinal sleep database to analyze millions of nights of Sleep Stages data to determine how age, gender, and duration affect sleep quality. (Sleep Stages is a relatively new Fitbit feature that "uses motion detection and heart rate variability to estimate the amount of time users spend awake in light, deep, and REM sleep each night.") Here are the findings: The average Fitbit user is in bed for 7 hours and 33 minutes but only gets 6 hours and 38 minutes of sleep. The remaining 55 minutes is spent restless or awake. That may seem like a lot, but it's actually pretty common. That said, 6 hours and 38 minutes is still shy of the 7+ hours the the CDC recommends adults get. For the second year in a row Fitbit data scientists found women get about 25 minutes more sleep on average each night compared to men. The percentage of time spent in each sleep stage was also similar -- until you factor in age. Fitbit data shows that men get a slightly higher percentage of deep sleep than women until around age 55 when women take the lead. Women win when it comes to REM, logging an average of 10 more minutes per night than men. Although women tend to average more REM than men over the course of their lifetime, the gap appears to widen around age 50.

48 of 75 comments (clear)

  1. So no mothers by Anonymous Coward · · Score: 1

    I guess moms don't use Fitbit? Especially moms of young kids.

    1. Re:So no mothers by jellomizer · · Score: 2

      They are probably probably washed away in the averages.
      I wish the media would include Standard deviation in their repotting of percentages and averaged.
      Because because of the factors like child care it may have gave women a wider standard deviation.

      --
      If something is so important that you feel the need to post it on the internet... It probably isn't that important.
    2. Re:So no mothers by Opportunist · · Score: 2

      No, they have other expenses to worry about than to squander money on feelgood trash.

      --
      We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    3. Re:So no mothers by fph+il+quozientatore · · Score: 1

      Also, I guess that there are not many 70-80 year old people using it.

      --
      My first program:

      Hell Segmentation fault

    4. Re: So no mothers by Entrope · · Score: 1

      That 55 minutes is not lumped at the start of the night. It's when the person gets up and does to the bathroom, or tosses and turns for a few minutes at 3 AM, or -- judging from how the Fitbit app shows my data, and Fitbit's description of what to expect -- some tens of seconds every time you roll over.

      I'm not sure I'd count that last as really waking up, but perhaps there is scientific consensus that it should be.

  2. Sleeping it Away? by dcw3 · · Score: 4, Interesting

    So, women are sleeping 25 minutes more per night, or the equivalent of 6.3 days per year. At the U.S. life expectancy of 81.6, they're sleeping about 517 days more than men over their lifetimes. With men only living 79.3 years, it almost makes up for the difference.

    --
    Just another day in Paradise
  3. Accuracy of results? by zephvark · · Score: 2

    This is all very interesting but, it's entirely from Fitbit data. Is there any information at all about how reliable this is? Are there similar studies that don't rely on cheap consumer devices?

    1. Re:Accuracy of results? by Cochonou · · Score: 1

      There have been sleep studies conducted before fitbit was invented. I do not say that they were better or worse than what fitbit reports, since I do not have sufficient data on the matter. However, be aware that a high sample size is useless if the measurement method is flawed.

    2. Re:Accuracy of results? by xantonin · · Score: 1

      There's also an inherent flaw in the fact that the sample is from the type of people that would wear a Fitbit.

      How much sleep do the people get who aren't worried about their health, can't afford one, or aren't interested in data? (Or also don't like wearing ugly devices on their wrist)

      Perhaps these people sleep much more soundly at night.

  4. REM gender gap by Jack_the_Tripper · · Score: 1

    Take to the streets my brothers to close this REM gender gap!!!

    1. Re:REM gender gap by geekymachoman · · Score: 1

      You're a bigot. /sarcasm

    2. Re:REM gender gap by DontBeAMoran · · Score: 1

      What do you mean? An American REM or a Japanese REM?

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  5. Re:Sexiest trash! by Opportunist · · Score: 1

    WTF..?

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    We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
  6. Not accurate by Anonymous Coward · · Score: 1

    I have a Garmin watch and it has a feature to monitor sleep patterns and I can say for a fact that it is wildly inaccurate. It can be off by 2-3 hours. It also doesn't account for catnaps that occur during the day.

    1. Re:Not accurate by DontBeAMoran · · Score: 1

      Why would you put a garmin watch on your cat and why would that affect your own sleep patterns?

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      #DeleteFacebook
    2. Re: Not accurate by GrumpyNope · · Score: 1

      I can second this. I've seen numerous reports from people with Garmin trackers that the sleep tracking is very inaccurate. I've found my Fitbit to be actually be very accurate in the regard.

  7. Re:Nightshift? by gl4ss · · Score: 1

    uh.. since nightshift people are a minority of course average of x is going to be mostly about people sleeping in the night.

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    world was created 5 seconds before this post as it is.
  8. Re:Nightshift? by EzInKy · · Score: 1

    So despite their being responsible for the protection of life and property around the clock night shift workers are considered statistical out layers? I'm finding myself strangely sympathetic to those who use the term little "snowflake" right now despite my strong left leaning political view right this moment.

    --
    Time is what keeps everything from happening all at once.
  9. Re: Nightshift? by Zero__Kelvin · · Score: 5, Insightful

    If you read the summary (and have decent reading comprehension skills) then you would know that the fit bit doesn't use the time of day to determine sleep times. Like Santa Claus it knows if you are sleeping and knows if you're awake, so tone down the hyperbole and chill out for goodness sake!

    --
    Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun
  10. Re: how about when... by Zero__Kelvin · · Score: 1

    Use 2 D20s for better accuracy.

    --
    Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun
  11. Re:Nightshift? by tehcyder · · Score: 1

    So despite their being responsible for the protection of life and property around the clock night shift workers are considered statistical out layers? I'm finding myself strangely sympathetic to those who use the term little "snowflake" right now despite my strong left leaning political view right this moment.

    If you say that Einstein was a statistical outlier in terms of intelligence, you're not criticising him for being clever.

    --
    To have a right to do a thing is not at all the same as to be right in doing it
  12. Re:Too much sleep == headache by tehcyder · · Score: 4, Funny

    I physically can't get 8 hours (or more) every night or I get a weird headache and I feel groggy all day long. The sweet spot for me is around 7 hours.

    Congratulations, you are Mr Average.

    Normally on Slashdot people would be boasting about how they need either one or twenty hours sleep because of the super-specialness of their brains.

    --
    To have a right to do a thing is not at all the same as to be right in doing it
  13. 25 minutes difference explained. by Anonymous Coward · · Score: 3, Funny

    Men enjoy sex for 25 minutes on average while their partner is fast asleep.

    1. Re:25 minutes difference explained. by DontBeAMoran · · Score: 1

      Not sure if it's a fuck-my-wife-while-she-is-sleeping joke or a I-masturbate-next-to-my-sleeping-wife joke.

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      #DeleteFacebook
    2. Re:25 minutes difference explained. by DontBeAMoran · · Score: 1

      Oh yeah? Well, fuck her!

      --
      #DeleteFacebook
    3. Re:25 minutes difference explained. by anegg · · Score: 1

      Isn't the idea of a steady partner with whom to have sex on a regular basis a fantasy for most Slashdot users?

  14. Re:"...gender" by Gonoff · · Score: 1

    That suggests a future medical study. "How being LGBTQIA can affect sleep patterns."

    --
    I'll see your Constitution and raise you a Queen.
  15. IRB? Ethics statement? Informed consent? by pz · · Score: 1

    I read the linked article, but it does not show the primary report, nor does it appear to have a link to it (if someone finds it, please help me out).

    There's an important issue within human experimentation, and this study most certainly falls within that rubric: if you plan on publishing the results of the study, it is considered human research, and there are a host of regulations and ethical standards that we, as a society, have agreed must be met. First, there needs to be oversight by an Institutional Review Board. Where is that? Next there needs to be a statement of which articles of human rights during experimentation are being adhered to (nominally, it's the Helsinki Declaration). Where is that? Finally, there needs to be informed consent by the participants, even when, as in this work, it is purely anonymous and observational. The EULA does not count. Informed consent documents are short, simple documents that are written such that an 8 year old can understand them, and must be administered individually. Nominally, they require a signature (written consent), although for minimal risk studies, presumably like this one, oral consent is usually sufficient -- but in that case there still needs to be an experimenter administering consent. Individual administration clearly did not happen here.

    Usually when companies do stuff like this, internal research, the fine details of ethics issues go out the door, which is usually OK for minimal risk studies (like Google playing with different color links to see which are most effective), as long as the results are not to be published. If they are going to be published, then no reputable journal would accept them without the fine ethical details taken care of. If the work is for internal use only, and will not be published, then the requirements do not apply.

    At least that's the way it works in my world, and I do these sorts of experiments for a living.

    --

    Put my fist through my alarm clock with its ding-dong death inside my ear. - The Blackjacks.
  16. Re: Nightshift? by DontBeAMoran · · Score: 1

    Like Santa Claus it (fitbit) knows if you are sleeping and knows if you are awake...

    And I think unlike Santa Claus, fitbit knows when you're having sex.

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    #DeleteFacebook
  17. Re:Too much sleep == headache by DontBeAMoran · · Score: 1

    Since tehcyder has classified you as "Mr Average.", you may be interested in a top-secret military human hibernation experiment.

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    #DeleteFacebook
  18. Re: Nightshift? by Zero__Kelvin · · Score: 3, Funny

    It is a well established fact that he knows when you've been naughty.

    --
    Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun
  19. Re:how about when... by DontBeAMoran · · Score: 1

    I once played D&D with my friends, we used a 1D1.

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    #DeleteFacebook
  20. Re:Incorrect - "Some fitbit users" is correct by DontBeAMoran · · Score: 1

    So what you are saying is that a fitbit measures how much of a pedo you are?

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    #DeleteFacebook
  21. The bullshit of averages by holophrastic · · Score: 1

    "10 minutes more" is well below the one-late-night-per-week effect. This could be nothing more than men have one restless night each week. Or men stay up late one night each week. Or thunder wakes up men more than women.

    Or, of course, the men who use a fitbit don't sleep as much as the men who don't.

    Garbage bias, garbage average, meaningless conclusions.

  22. Related question: by demon+driver · · Score: 1

    Could sleeping less be one of the reasons for men dying earlier than women?

    1. Re:Related question: by ffreeloader · · Score: 2

      This is very possible. Sleep studies done over the last few decades have proven that sleep deprivation results in a lot of health problems. From my own experience with a sleep disorder I can verify that it causes weight gain, long term high blood pressure, and an increased risk of stroke and heart attack.

      Over and above those issues even small amounts of sleep deprivation have a large effect on motor skills. Studies have shown that sleep deprivation affects driving skills as much as drinking does. Just like it doesn't take a lot of alcohol to affect driving skills it doesn't take a lot of sleep deprivation to do the same thing.

      --
      "while democracy seeks equality in liberty, socialism seeks equality in restraint and servitude." de Tocqueville
  23. Possibly missing relevant data by demon+driver · · Score: 1

    I can confirm a tendency for headaches after getting more than eight hours of sleep, but then again the occasions when I sleep that long mostly are after having had too much to drink!

  24. Re:IRB? Ethics statement? Informed consent? by del_diablo · · Score: 1

    So I read your statement, and i guess that makes sense.
    But what is the difference between human experimentation, and publishing censored data logs compiled into statistics?

  25. Re: Too much sleep == headache by swillden · · Score: 1

    I don't know how people can sleep 20 hours without getting a headache. I know I'm not the only one.

    I don't think I've ever gotten a headache from sleeping too much. I just don't know how you could sleep 20 hours, at all. Not without pharmaceutical assistance, anyway. There comes a point where you're just done sleeping, and awake.

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  26. Re:Incorrect - "Some fitbit users" is correct by Zero__Kelvin · · Score: 1

    Holy shit. The Donald is a slashdotter, and has a fitbit on his ridiculous looking clip-on tie!

    --
    Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun
  27. Re:IRB? Ethics statement? Informed consent? by GungaDan · · Score: 1

    Waiver of consent is permitted in certain instances under 45 CFR 46 (though the waiver must be approved by an IRB). See section (d) from Cornell's helpful guidance here --> https://www.law.cornell.edu/cf...

    -Your friendly neighborhood former IRB admin

    --
    Eloi are stupid, throw morlocks at them!
  28. So, when do you charge your FitBit? by mhollis · · Score: 1

    My wife has one. One of her physicians told her that he wants to see how much she is sleeping, how many steps she is taking, etc.

    But this is a battery-operated device. And it needs to be charged. So I have to wonder whether or not this study held for users who were charging their FitBits all night, rather than allowing it to record their sleep patterns. I don't see the actual study on the link, just an executive summary.

    --
    Gods don't kill people, people with gods kill people.
    1. Re:So, when do you charge your FitBit? by godrik · · Score: 1

      When I was wearing a fitbit (I don't anymore, the battery died) I used to charge it when I was taking a shower. That pretty much cover the charging time that you need and disrupt very little the step count.

    2. Re:So, when do you charge your FitBit? by judoguy · · Score: 1

      My wife has one. One of her physicians told her that he wants to see how much she is sleeping, how many steps she is taking, etc.

      What passes for doctors these days is pitiful.

      No matter the ailment, s/he'll just prescribe more statins and say exercise more. And if the device thinks she's sleeping too much or not enough, she'll get anti-depressants.

      --
      Peace is easy to achieve, just surrender. Liberty is much harder get/keep.
  29. How do so many people survive with little sleep? by hackel · · Score: 1

    If I don't get my 8 hours in, I'm an absolute unproductive disaster at work the next day. How do a *majority* of US Americans survive with less than 7 hours of rest each night? I just don't understand it. I know a lot of people are addicted to coffee, which I can't stand personally, but can that really explain it? Or does my body just need more sleep than most people? (Not so, according to the CDC and loads of other studies.)

    I think one of the biggest problems in our society is people getting started in their day far too early, as if we are still farmers or something. There's absolutely no reason for an office-type job to begin before 9 AM, for example. Work just isn't that important. People need their sleep. Imagine how productive we could be!

  30. So we gonna talk about the gender gap? by ckatko · · Score: 1

    Clearly men sleeping less is an important gender issue and I can't wait for all the social justice kids to start writing 8 articles a day about how women are clearly sexist and things need to change. After all, feminism and social justice isn't anti-male.

    And since "Air Conditioning is Sexist":

    http://www.telegraph.co.uk/wom...

    Why can't sleep be?

  31. Re: Nightshift? by Zero__Kelvin · · Score: 1

    That is incorrect. There is nothing wrong with having sex (EXCEPT when there is ... like if you have it with goats again), and even when it is not wrong, it is still naughty. Good luck learning English!

    --
    Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun
  32. Re: Nightshift? by Zero__Kelvin · · Score: 1

    Well, much akin to Mae West (who said "When I'm good I'm very good, but when I'm bad I'm better"), when I am naughty I am extra nice :-)

    --
    Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun