Pulse zone peak incorrect

[Camilla_R]

I just got the latest update which includes the new "active zone minutes".

I am 40 years old but have adjusted my max pulse to 195 bpm. Fitbit then calculates my pulse zones as folllowing:

Fat burning: 118-142 bpm

Condition: 143-174

Peak: 175+.

That seems much too high! Peak is almost 90% and fat burning starts from 60% and stops at 74% of max pulse... I am rarely above 118 bpm when I take a normal walk. 

Normally you say that peak starts at 85%....? 

How is this calculated? 

[LZeeW]

@Camilla_R   Active zone minutes are calculated completely different from active minutes.  Active zone minutes take your resting heart rate in to account.  You can see how your zones are calculated in this Help article. 

[Camilla_R]

I couldnt see anything about the actual calculation in that link?

My question is how it is possible that my peak pulse zone has been
calculated to start at 90% of my max pulse... or that fat burning only
occurs from 60% of my max pulse, that is a brisk walk will not return any
active zone minutes.