Inspire 3 Heart Rate Runs Amok

[Blue24]

While on my NordicTrack ski machine my heart rate initially is reasonable but about halfway through the exercise my heart rate runs amok.  I hold the cross bar during the exercise.  MY HANDS ARE NOT MOVING!  Anyone know why the HR is so erratic?

[JuanFitbit]

@Blue24 , A warm welcome to the Community! Thank you for your message and the screenshot shared. 

Thank you for confirming that you have the hands holding the crossbar. 
Normally these spikes appear, when the heart rate cannot be retrieved/ measured. Mostly this happens when the wrist has been moved and the Inspire 3 cannot read the heart rate. 

Have you noticed if the green LEDs do blink when the spikes occur? 

In the meantime, please charge the Inspire 3 for at least 30 minutes. 

1. Press and hold the buttons on your tracker for 10 seconds.
2. Release the buttons. The tracker has restarted when it vibrates and the Fitbit logo shows up.

Then additional to that try , during the workout, to wear the Inspire 3 so that the heart rate sensor is touching the underside from the wrist. 
Here it's easier to read the heart rate.