Heart rate Differences in the app vs Fitbit

[Leannemw]

Why are the heart rate different in the sleep section than it is in the heart rate section and also different on the Fitbit?

[LZeeW · Accepted solution]

Hello @Leannemw and welcome to the Community.  I apologize if I am misreading your post.  Your sleeping heart rate, in your Restoration tile, graphs your average heart rate over one minute.  Your daily heart rate graph, from the heart rate tile, shows your average heart rate over five minutes.  Your Fitbit shows you current live heart rate.

[Leannemw]

Oh ok. Maybe that is not what I was not understanding. But why would they
do that? It seems odd, the last couple nights the graph for sleeping shows
my heart rate spiked to 132bpm but the heart rate tile does not show any of
that.

[LZeeW]

@Leannemw   I'm not a Fitbit employee, so this is my take on this.  Your heart rate trace in your exercise details is also at one minute intervals and it's Fitbit's way of giving you more details about yourself.  It's possible that your 132 bpm was an artifact -- a bad measurement while you were rolling over.  It had to be a very brief period of time and got smoothed out in the five minute average in the daily heart rate.  Your daily heart rate will never show the highest high or the lowest low.