Hi,
It's been second time that i've noticed that when new Lactate Threshold is detected my watch also updates max HR value by the same difference. For example this morning my LTH went from 174 to 176 and watch updated those in runing zones but it also updated my max HR from 200 to 202 ... It seems like a bug to me... Previous time it updated my max HR to 206
And to clarify in both runs i had max HR of ~192 so i didn't get new max HR reading (my current is 200 from 3 months ago)