In the My Stats > User Profile > Heart Rate Zones > Resting HR menu, there are two options; Use Average and Set Custom.
Neither seem to be working properly for me. No matter if I choose Use Average or Set Custom, whenever I then sync the watch with Garmin Connect Mobile on my phone, the value is overwritten with something different.
What that different is depends on how my zones are configured in Garmin Connect.
I had Running, Cycling and Secondary zones configured.
Running and Secondary were both set the same, to % of LTHR. Cycling was set to % of HRR, and I had entered a value for the resting HR here. This value was getting synced to the watch, no matter what I set on the watch.
When I changed my cycling zones to be % of max HR instead, now a null/blank value (shown as '--') is synced to the watch, but again overriding whatever is set on the watch.
Anyone else have this problem? or found a way to make it work as expected?