Ionic heart reading wrong since last update

[alex.fitness]

Hello

Since the last update we received a few weeks ago that required me to re-calibrate, my ionic heart rate is out of whack. I never get in the peek zone even if my true heart rate measured with an oximeter  says 177, the Ionic reads 155. This is really annoying. Is there any way to run a calibration ?

Moderator Edit: Clarified subject

[SilviaFitbit]

@alex.fitness A warm welcome to the Fitbit Community. Thanks for getting in touch about this. 

I appreciate the detailed information shared. I see where your disappointment is coming from, I'll be happy to help you. 

If you're no longer receiving the calibration message then there's no need to do it. Regarding your heart rate data, as with all heart-rate tracking technology, accuracy is affected by personal physiology, device location on your arm, and type of movement.

For a more accurate heart-rate reading:

• Wear your Fitbit device on top of your wrist, and make sure the back of the device is in contact with your skin.
• When you’re not exercising, wear your device a finger’s width above your wrist bone.
• During exercise, wear your device a bit tighter and higher for an improved fit. The band should be snug but not constricting (a tight band restricts blood flow, potentially affecting the heart-rate signal). Many exercises such as bike riding or weight lifting cause you to bend your wrist frequently, which could interfere with the heart-rate signal if the watch is lower on your wrist.

Additionally you may want to check the factors that can affect your heart-rate reading on your Fitbit device. 

I'll be around if you have any additional questions!