Blaze and dashboard heart rate differing massively

[Kezmo66]

When I was was doing some excersize today my highest heart rate according to my blaze was around 138 for a while. However, one my dashboard on the app, it says that my heart rate never exceeded like 120. Any ideas?

[Rich_Laue]

Hello @Kezmo66,  are you looking at the days summary or the log of the workout.

The workout log shows periods of 1 second, where the days summary averages the Heartrate over a longer period. I think 5 seconds but don't quote me.

So yes it is possible for the days summary not to show short peaks

[Kezmo66]

So my app will not show me my maximum heart rate for the day?

[Tinu]

Hello, I have the same issue recently on a FitBit Blaze and on a Charge3, when I compare the max HR during the exercise with the max HR in the daily summary for the same spike. See below. The data is for two different people.

The max HR in the exercise summary was around 160 BPM, but in the daily summary dashboard the max was 140 BPM. On the Charger 3 the difference was even higher, respectively 190 BPM on the exercise summary vs. 160 BPM on the daily summary dashboard. 

20-30 bpm is pretty high difference and it is important when you talk about the max HR especially because you need to know on which number to count if you want to push harder than usual.

I am very interested on the answer /

[Rich_Laue]

The daily summary breaks the heart rate down in bigger chuncks the it does dieting a recorded exercise. 

So yes if the spike didn't last the whole period for the daily summary this average could explain it.