Sense data won't match between HR and AZM graphs

[Chuck59]

Can anyone explain why my HR will show as say 65 in the “regular” heart rate tile but at the same exact time show as say 96 up in the zone graph?  The regular one seems accurate but the zone one is all over the place.  This is at rest…clearly there must be some type of glitch?

Moderator Edit: Clarified subject

[Guy_]

Hi @Chuck59  - the heart rate tile can show information from different times, it can show an overall resting heart rate, a current heart rate and the graph only shows a value [taken or averaged] at intervals [maybe every 5 minutes] which may not necessarily coincide with the current value.

[Chuck59]

Right, but this happened at the exact same time…at 9:30 exactly on both (the times show) and there was a 30+ beat difference.  

[Guy_]

@Chuck59  - the graph interval is aligned with a 5 minute value for the period, not the rate at that time, so that's to be expected.

[Chuck59]

So it’s a glitch…taken manually my HR aligns with the regular HR tile while the zone HR shows it wildly higher.   Don’t see how that can be since I’m assuming they both use the same sensor but here we are 

[Guy_]

@Chuck59  - it is not a glitch, it's how it works, two different values using the same sensor which cannot be compared.

The value at 9:30 in the graph is for the preceding five minutes [9:25-9:30] and the tile heart rate value is for now.

[Chuck59]

OK, let me try again…clearly we’re talking past each other.  I said in my original question it was the “zone” and “regular” tiles that weren’t jibing but let me be more explicit.  At the top of the app, if you click on “zone minutes” a graph is displayed showing your HR; the same thing happens when you click on the “regular” heart rate tile farther down.  THOSE are the two graphs, ostensibly measuring the same thing at the same time, that are way off from each other.  The HR in the zone minutes graph will show as 95 while in the regular graph it shows as 65…at the exact same time…and while the regular graph is displaying an average of the last five minutes, nothing can be in the 90’s for five minutes and then “average” out to 65…that math doesn’t compute. 

[Guy_]

@Chuck59  -  Not sure you can compare the two graphs because the resolution [time frame] may be different, and again different from the now heart rate when the adjustments are applied.

They also presumably use different algorithms to display the information.

Only Fitbit can give you the exact details as to how they are computed, this is just a users' forum.

Probably best to contact Fitbit Support directly. They may be able to help you, though even they are probably not privy to the internal workings..

Also reachable via the Fitbit App, click profile photo, Help & Support, Contact Customer Support.

Even if you go on the Web dashboard and export all your data [which is available there] and can drill down into the readings, you still won't be sure. how the data is processed.

[LizzyFitbit]

Hi there, @Chuck59. @Guy_ Thanks for the help.

@Chuck59 Thanks for bringing this to our attention. Just to clarify, do you mean you're seeing 95 Active Zone Minutes? Or is the 95 your heart rate reading? I'm asking this as the Active Zone Minutes will represent the time spent in the fat burn, cardio, or peak heart-rate zones during the day or even during an exercise. On the other hand, the second graph will only show the heart rate readings recorded throughout the day.

That being said, if by any chance the issue is with the Active Zone Minutes not matching the heart rate zones, please provide me with the model and OS version of your phone, as well as a screenshot of what is displayed on the Fitbit app. Please follow the instructions described here to attach a file on your post.

[Techgrunt]

I have observed the same behaviour with the graphs as well.  There also appears to be a trigger point that must be reached before it happens.  Also seems to, in my case, affect the portion of the graph between midnight and 2am approximately.  The section seems to triple in scale.  
I will try to attach the photos of the graphs, however I cannot find the area referred to in the message link above on my iphone.  I may need to go to a real computer

[Techgrunt]

 

 heart rate and zone minutes graph in sync

[Techgrunt]

 

 heart rate and zone minutes graphs out of sync.   Most aparrent in the midnight to 2 am area.  

[Techgrunt]

   

 

 Ok last set.  Additional error i have noted is the presence of zone minutes in the graph that don’t exist in the data further down.  This set is the most pronounced in the error.  

[99montez34]

For an activity today, my maximum heart rate within the 'Active Zone Minutes' module was 142, within the 'Exercise' module it was 150, and within the 'Heart Rate' module it was 138.

3 different maximum values given for the same period of time doesn't instill confidence in the accuracy of my Sense!

And don't get me started on how it thinks I am asleep while I am just resting - and vice versa; editing the sleep start/stop times seems to further alter it.

[Billio1190]

I stumbled across this while trying to figure out what was going on with my own charts. The simplest explanation I can give is that the graph for ”zone minutes” is just more accurate than the “today” graph. The zone minutes are tracked every minute but the numbers shown on “today” are the average of 5 minutes. Meaning the heart rate only spiked up for a minute at most (probably snoring based on everything I’ve read). Hope this helps! 

[Techgrunt]

It doesn’t explain the zone minutes graph shifting from the a.m. results to a different p.m graph with the same data.  See the midnight to 3 a.m. area shift from the morning graph to the evening graph.  Also the zone minutes showing on the graph that don’t exist in the zone minutes data.  There is a problem in the way the graph routine is processing the info to create the graph.  

[LizzyFitbit]

Hi there, @Techgrunt and @99montez34. @Billio1190 Welcome on board.

Thanks for the details and screenshots provided. I'm sorry the heart rate, exercise and Active Minutes Zone graphs show different heart rate readings and appreciate your efforts on this matter. Given this situation, may I know the model and OS version of your phone? Also, do you recall since when this started to happen? These details will help me to further investigate.

In the meantime, let me recommend trying the following steps in the given order:

1. Log out from the Fitbit app.
2. Check if the Fitbit app is updated.
3. Force quit the Fitbit app and reboot your phone.
4. Open the Fitbit app, log back into your account and pull down on the screen to force a manual sync.
5. Check your graphs one more time and let me know how it goes.

[99montez34]

Hi, mine is a Samsung Note20 Ultra 5G Android version 12.

[Techgrunt]

Hi LizzyFitbit,

 Info is as follows:

iPhone Xr

iOS 15.5 (latest update)

Fitbit app 3.60 ( latest update)

I tried the process you gave and no change to older graphs.  It has been making the errors for at least the last few updates, however I can’t remember when it started.  I would presume it started at least as far back as the original poster for this question.  I added in my pictures when I found the posting as the inquiry seemed to have gotten lost.  

Hopefully I can generate a graph tomorrow to test for the error just in case the process did accomplish something, but the phone has gone through a few restarts post updates of iOS so I expect that did the same thing.  I usually don’t have the Fitbit app running continuously though.  

[Techgrunt]

Well looks like no change.  By about 12:30 the zone minutes graph started to show the error.  At 5 and at about 9:30 things appeared ok.