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Max heart rate not calculating correctly from lactic acid threshold

I've been using the Garmin proposed lactate thresholds to set my max heart rate. My lactate threshold is 185 bpm. Up until about a week ago it worked fine - using that to calculate my max heart rate as 217 which matches my experience.

Last week it proposed an update to my lactate threshold, same BPM and updated pace. When I looked at the heart rate zones in the app it set my zone 4 to 185 bpm and my max heart rate to 186 bpm. When I try to manually set my lactate threshold it won't even give me the option for 185, only allowing me to set 184 and below.

Screenshot:

0 Bitti over 2 years ago

Yes, it seems that setting the HR zones based on the lactate threshold may cause the end of zone 5 to be lower than your set max heart rate, but the lactate threshold change doesn't change the set max heart rate on the watch (you can check that separately from the HR zones), it only affects the thresholds of HR zones. And since VO2max etc. calculations use the actual set max heart rate, not the HR zones, the only effect of the wrong HR zone 5 upper limit is how the watch graphically shows the zone 5 for you.

So to my understanding, there's nothing you have to do, since your actual max heart rate is still seto to what is was before. But if you want to manually correct the upper limit of HR zone 5 to be the max heart rate you set before, just edit the BPM on the screen you showed.