Heart rate accuracy Charge 5

[Beth5000000]

The heart rate readings seem to be way off with my new Charge 5.

I can be sat down for a few hours and it reads my heart rate at above 90bpm and yet when doing intense exercise it can read below 70bpm, how is this possible? 

Is there a way to recalibrate the device?

Moderator edit: subject updated for clarity

[DavideFitbit]

Hi, welcome to the Community forums, @Beth5000000.  

Thank you for sharing this information about the inconvenience you've been experiencing with your Charge 5.  

There's not an exact procedure to complete a recalibration of the heart rate feature. If you haven't done so already, I recommend that you try restarting the device using the three pulse restart method mentioned here below, instead of the restart option found on the Charge 5 itself: 

1. Connect your device to the charging cable. For instructions, see How do I charge my Fitbit device?
2. Press the button located on the flat end of the charger 3 times, pausing for 1 second between presses. Then wait 10 seconds or until the Fitbit logo appears.

In addition, please follow the instructions in this article to improve the accuracy of heart rate information and check the information mentioned here about other factors that could affect your heart rate reading, this has been useful to other users who have experienced something similar. 

Hope this helps, I'll be around.