New Fitbit Features Deliver Data Previously Only Available Through a Sleep Lab

Fitbti sleep stages sleep insights announcement

Sleep, slumber, shuteye, Zzzs. Call it what you will, just make sure you stay on top of it. How much—and what kind of—sleep you get can affect your appetite, energy, weight, and recovery, not to mention protect against heart disease, diabetes, and cognitive decline. In other words, it’s pretty critical to your health and well-being. That’s why Fitbit is taking sleep tracking to the next level with Sleep Stages and Sleep Insights, two innovative new features that give you access to information previously only accessible in a sleep lab.

How Sleep Stages and Sleep Insights Work

Up until now, Fitbit’s manual and automatic sleep tracking used accelerometer data and machine learning algorithms to estimate how much time you spent asleep and awake each night. By taking more metrics into consideration—including continuous heart rate data—Fitbit was able to develop two new tools to help you better understand your sleep habits and how they compare to other people of your same age and gender. Here’s what they are and what they do:

Sleep Stages

Sleep Stages uses accelerometer data, heart rate variability (the time between beats), and proven algorithms to estimate how long you spend in light, deep, and REM sleep stages (as well as time awake) each night. Each stage is important, but for different reasons.

  • Light Sleep (including sleep stages 1 and 2) occurs throughout the night and is important for memory, learning, and letting your body recover from the day; for most people it is 50-60 percent of your night.
  • Deep Sleep (sleep stage 3) promotes a healthy immune system and muscle growth and repair; for most people it is 10-25 percent of your night (depending on age).
  • Rapid Eye Movement (REM) Sleep is when most dreaming occurs and is important for mental recovery and memory formation; for most people it is 20-25 percent of your night. Most REM sleep comes at the end of the night, and is often the stage that’s cut short when your sleep duration decreases.
  • Awake minutes (between 10-30 times per night) are a normal part of your sleep cycle each night, and is typically when your heart rate is more elevated during sleep.  

Fitbit Sleep Stages Detail

Everyone’s sleep cycle is different, but by better knowing your sleep quality and patterns, and realizing the impact it has on your day, you can make lifestyle changes—such as diet, exercise, winding down before bed, and keeping a consistent sleep schedule—that can help improve your sleep over time. For more information, check out REM, Light Deep: How Much of Each Stage of Sleep Are You Getting?

Sleep Insights

For this feature, Fitbit uses the whole of your Fitbit data—everything from your diet to your exercise patterns—to discover trends about what may be affecting your sleep and then offer up personalized guidance on how to improve it.

For example, if you use a tracker that automatically tracks sleep, one insight may read: “You sleep a bit better on nights after a run. It’s subtle, but you spend 5 fewer minutes being restless/awake on those nights.

Another potential insight could be: “Starting your day at a regular time helps lock in a stable circadian rhythm. This week you did a great job by having a consistent wake-up time!”

Sleep Insights relies heavily on your sleep logs, so the more you wear your tracker to bed, the more personalized insights you may receive. Hopefully, by better understanding your sleep patterns—and what affects them—you’ll be empowered to make lifestyle changes that can help improve your sleep (and overall health and wellbeing) over time.

How Fitbit Developed Sleep Stages and Sleep Insights

Over the past two years, Fitbit sleep scientists and product teams worked with industry-leading sleep experts from Johns Hopkins University, Stanford University, and the University of Arizona on everything from the design to the development of these features.

For Sleep Stages specifically, the Fitbit team conducted extensive internal testing by observing and analyzing several hundred nights of heart rate and movement data from volunteer sleepers while simultaneously comparing that to information gleaned from gold-standard lab equipment. They then used existing research on the connection between heart rate, movement, and sleep stages to develop an automated algorithm that could recognize and track each sleep stage.

Sleep Insights was developed by combining the current scientific understanding of sleep with Fitbit data gained from over 3 billion nights of logged sleep. Fitbit’s panel of sleep experts personally validated every insight that will be communicated to you, making sure the information is both applicable and scientifically valid.

Start Sleeping Better

Sleep Stages is available globally on Fitbit Alta HRCharge 2, and Blaze. The feature is viewable in the Fitbit app—which is compatible with Android, iOS, and Windows devices—and on your Fitbit.com dashboard. Sleep Insights will be available in the Fitbit app and work with all Fitbit devices except Zip, which does not track sleep.

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    • The last paragraph:
      …”Sleep Insights will be available in the Fitbit app and work with all Fitbit devices except Zip, which does not track sleep.”

      Sounds like it will be coming in a future update, I fm reading it correctly.

      • The sleep insights are available for all devices but the zip. However, it appears that the stages will not be available for all devices. If you can’t have the sleep stages now, maybe the Fitbit technology will evolve and come in an update in the near future.

  • Sorry to ask the obvious question, Is this amazing feature backward compatible with my fitbit XYZ. If so, when will it become available on my fitbit XYZ?

    I have a Surge.

    • My charge 2 recorded my sleep in the new Sleep Stages mode for only one night (28 March) and from 29 March reverted back to old mode. It looks a great function but I’m disappointed I had it for only one night’s data display

      • Mine did the same and I think it seems to show the new data as long as i dont manually begin my sleep log. If I just go to sleep without going in the app then the new data seems to be there in the morning!

  • I just replaced my Alta with a ChargeHR2, comprising a slimmer profile for more in depth tracking and features. And I’m going to miss out on this… because? Kind of annoyed.

  • Really looking forward to Sleep Stages and Sleep Insights update. Charge2 is a great Fitbit. I wear mine all day and night and this update will provide me with even more information. Psyched!! Keep steppin’!!

  • I would like to replace my jawbone up3 with the Charge 2 now that REM sleep is available.
    What is still missing, but it should be only a software update, is the possiblity to have a smart alarm that will wake you up before a set time whenever it detects you are in light sleep. That’s why i got the up3. But since the jawbone quality is really bad (bracelet falling apart and not replaceable) and i guess the company is not doing so well i’m turning to fitbit

  • why has the graph changes shown up for my Blaze and Charge 2 but they are not recording any information yet? I tried restarting my phone but nothing still. It did update the new abilities but it’s not working on mine.

  • How come sleep insights only worked for me the first couple of days after I updated the app and now they are not working anymore?

  • Is this why the Log/Sleep screens have changed? If so, please change it back. The new system doesn’t log time the same as before.

    • I agree..I don’t like the new one. I needed to know how many times a night I was restless due to a medical condition

  • My Fitbit Blaze reverted back to the previous sleep patterns instead of showing REM, last gut, etc. Did something change?

  • Any updates on when this new sleep tracking feature will be available on the Charge 2? I keep reading it will be available in April and Engadget said it will roll out with a firmware update.

    Are firmware updates automatic or is this something I need to watch for and manually do myself? Also, I see people in the new asleep Group saying you have to switch your sleep tracking mode to “sensitive” in order for this new feature to work. Is that true? A little more info on all of this would be great!

  • The new sleep tracking feature worked for a week on my new charge2 and I really liked it, but it reverted back to the previous form last night. Any suggestions?

  • Missing the time information with the new screens. My charge 2 in UK is still not showing sleep stages. Has the roll-out timetable slipped? OK if it has but nice to know. Thankyou.

  • This only worked a week on my Fitbit and now it is back to the old version!! Help, I love the new tracking of light, deep, REM.

  • Does a “smart alarm” will be introduced once for fitbit Charge2 ? This would be a very nice feature. And I think that technically this is no big deal if the tracker already recognize the sleeping phase.

  • Could you provide an update regarding why the sleep stages appeared for many of us for three to five nights last week, only to suddenly roll back to the old format without explanation? Will they be brought back?

  • For about 2 weeks the new featured appeared and worked find. As of today, April 5, my Sleep Stages has reverted back to the old method…. what has happened to the new feature? I have the CHARGE 2.

  • I love this feature and it worked great for just over a week but last night’s data is presented in the old format (asleep, restless, awake). Is this a known issue? I use a Blaze. thanks!

    • I’m at present reading this article to find the answer to the same question. The only thing I’ve found is that they are still perfecting the feature and asked that we be patient. Confusing that an update can revert back to a previous feature. Seems like it was on a timer. My daughter has a Charge 2, as do I, hers never had the sensitive sleep feature. Mine worked April 19-27. The update was on April 17.

  • I had this update on my Charge 2 for a few days, and it went away. I like the new sleep tracking, but have two issues with it. It needs to count the number of times awake, not just give you a percentage! Also, would be nice if we could zoom in on the sleep charts more and time at the bottom of charts was shown in half hour increments instead of four hour blocks.

  • I purchased a charge 2 & the sleep patterns worked the first night but has not worked since then. Why would this happen?

  • Just to echo previous comments, I need to know the time I was restless or awake in order to track sleep patterns for apnea. As others have mentioned, this feature was dropped in the latest versions.
    previous comments: Missing the time information with the new screens.

    Wondering who to contact as my sleep tracker quit working
    s this why the Log/Sleep screens have changed? If so, please change it back.

    The new system doesn’t log time the same as before.
    Is it possible to have the old style back if you don’t like the new info?

  • This would be a great feature if it worked consistently. Unfortunately no matter where on my wrist or how tight/loose I wear it or what position I sleep in, the sleep stages function has only worked twice in almost three weeks of nightly wear.

  • I have a charge 2 and still haven’t received the update for the sleep cycles. I want it. How do I get it ??? everyone else I know with one received the update several weeks ago.

  • It’s really crappy that I spent the money on a surge, but don’t have this feature. My wife’s 69 dollar charge 2 does. Pretty disappointing.

  • Went to bed last night with my Blaze but this morning only had the old data- have the sleep cycles been discontinued?

  • I have brand new Charge 2 and has only ever shown “No Sleep Stages”. Even when I went to help section and it said to tighten it if I wasn’t getting readings. It’s well past March rollout date.

  • Ok for 15 months I’ve had a Charge and now a Charge 2 – I always sleep with it on. When I check my phone app, my stats for sleep haven’t changed much for all that time, but last week my stats have shown that I am in bed say for 8 hours but it is showing my sleep total to be approx 3 hours or 4 or 5 – and HUGE chunks of LIGHT BLUE which indicates RESTLESS/Awake but there are hardly any lines of RED to indicate AWAKE. It is so strange to me. There seems to be a more coherent chart when I sign on on to fitbit on my computer. I think there may have just been a sleep tracker update? Anyway, I have had some pain in last week – and I wonder if that is what is causing a change in my sleep pattern or if my fitbit is broken or malfunctioning? Is this ridiculous of me to think? Is there a way to post the charts here?

  • I had this data from my Charge2 after yesterday’s sleep – it was brilliant! – but it’s gone from today’s. What happened? Dud the update get reversed?

  • I don’t like the change they made on sleep with the One. Can’t see the sleep % nor does it show the times awake – only a graph mark and you have to guess what time it is. Please change back to the old way or correct this. It is frustrating.

  • The “new app” started 3 days ago and now instead of 7-8 hours of sleep, it shows 3’30” ! When I get up to use the restroom it suddenly thinks I’m up for the day! I am not happy with it at all! Can I have the old sleep app back?

  • Curious as to why I purchased the most expensive, “top of the line” Fitbit if it will not offer the best features? Maybe I read this article incorrectly, will this R.E.M. feature be available for the Surge?

  • My sleep stages stopped showing 2 days ago after showing for a couple of weeks. Will it come back again? Or do I need to do something? Teething problems??

  • My fit bit charge 2 started showing sleep stages (deep, light, REM) about 2 weeks ago. I really like the feature! This morning my fit bit reverted back to the old app (sleep, restless, awake). How do I get the sleep stage app to work again?

  • My Fitbit hasn’t upgraded to the new ‘Sleep Stages’ settings yet. It’s not showing any available updates. When will I get this new setting please?

  • The new Sleep info worked on my Fitbit Charge HR for 10 days. Last night it reverted back to the prior features. I’m sooo disappointed!! What happened?

  • It seems that many people have asked about why this is not available on the Surge, but I cannot see the answer. Will this become available for Surge?

  • Just bought an Alta HR. Sleep stages didn’t work the first night, worked the next three, then haven’t worked the last four. It only tells me when I am asleep or awake and that isn’t even accurate. I was awake for two hours that I know of that it said I was asleep. Did I get a lemon that I need to return?

  • I have a FitBit Charge and I’d like to get daily sleep information about how I sleep but I only get it once a week. How can I get it after each night’s sleep? Can anyone help me?

  • I have a Fitbit Flex 2 and trying to see the data for different stages of sleep, i.e. Light, R.E.M. , awake. All I see on my dashboard is times awake, restless.can you please tell me how I can get the specific graph data so I know when I achieve R.E.M.

  • I am new to Fitbit HR. The display for today’s sleep does not show details like REM sleep, deep sleep, etc. It did yesterday. I’m confused. Also, I had the Fitbit off while I took a shower today and it was logged as sleep and added to my overnight score. Do I need to know something?

  • I am new to Fitbit HR. The sleep data recorded last night was not displayed with REM sleep, deep sleep, light sleep etc, just awake time, restless, etc. Is there something I need to know? Also, I had the Fitbit off while I took a shower today and it was logged as sleep.

  • Love the new sleep tracking with my Charge 2. However, yesterday evening I watched a quirky but not-very-exciting movie (Terry Gilliam’s Zero Theorum) in bed, then got up, brushed teeth, walked the dog and went to bed. Looked at the app before turning off the lights and noticed Fitbit had logged the entire movie as sleep time (mostly light, with a few short spikes of deep early in the film). Interesting.

    • I think that as Fitbit is only improving, this will be resolved soon. It is very interesting, and I think that impressive results will soon show.

  • I need the original style or add how many times a night a night I am restless. This new graph was nice and looks pretty but it really doesn’t explain much.

  • My fitbit charge HR has stopped tracking sleep properly. Was tracking like the picture above, but now has gone to 2 times awake, 12 times restless and 31 min awake/restless in a 9hr 36 min cycle. Although I see the sleep start time is inaccurate starting an hour earlier than when I put my head on the pillow!.

  • My charge 2 won’t show my R.E.M. Sleep ? It’s new- updated my I phone and just synced it. How can I see that R.E.M. Report please?

  • I received a Fitbit charge 2 for Christmas. A friend of mine just bought one last week. Our sleep cycles on our apps have different
    Info on them. Hers has “receive sleep insight” which mine does not. It also shows what type of sleep she had eg. R.E.M., light etc. Why does mine not have these. They are the same versions?

  • I have an new Blaze. It records sleep and pulse but does not record sleep stages. What do I need to do to get the sleep stags feature?

  • I have yet to see an explanation for the small red tick marks at the top of the graph. Are those also awake times, but shorter than the awake periods that are connected to the rest of the graph?

  • where has my sleep stages data gone.
    I was getting daily REM, deep sleep, light sleep, awake data, until September 4?? Why did it stop and resort to the generic data report????

If you have questions about a Fitbit tracker, product availability, or the status of your order, contact our Support Team or search the Fitbit Community for answers.

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