HRM Pro dropouts and loss of dynamics data

+1

Yes I have had a similar issue with the latest 8.80 firmware on the HRM-Pro. So far I have found it has always been after a break, it is almost like the strap goes to sleep. Although heart rate still records, everything just dies.

maybe related:

FUNKYLARMA said:

So far I have found it has always been after a break, it is almost like the strap goes to sleep.

https://forums.garmin.com/sports-fitness/running-multisport/f/accessories-sensors/301559/bug-if-hrm-pro-is-set-to-provide-speed-and-distance-for-one-watch-other-watches-do-not-recieve-running-dynamics

RD is broken on latest firmware

I had dropouts too doing a morning HRV test - it goes to sleep cutting BT connection and only wakes up if shaken - not ideal as you need to be very still for HRV testing!!

I assume that the heart rate data at this time is taken from the clock - at the time of the loss of dynamics data , the pulse was higher than it should have been

You could test that theory by wearing the watch such that the WOHR sensor is not able to make any readings. (Opaque tape over sensor, in pocket, etc.)

If the HRM-Pro then does go to sleep then you will loose heart

Better disable OHR on the watch. It's well known optical sensor can "read" heart rate from your pocket, your wall or whatever the dumb algorithms try to identify as HR patterns.

Thanks I will give this a try, especially as last night I had another load of drop outs.

Do you know is the reset will clear the auto calibration data?

I think if it is a factory reset, all data of the HRM will be erased, except if the data is stored in the watch.

Anyone has a solution for this? I just had this exact same problem after a rest in my activity