Can anyone tell me what the heart rate zone numbers mean (i.e. 4.1z, 4.7z, 5.3z)? I am familiar with heart rate training zones, but not these numbers....
If, for example, you zone 1 is between 60% and 69%, then, the watch will show you your zone as 1z, if you are at 60%, it will show you 2z, if you are at 70% and, it will show you "portion" i.e. 1.5z if you are at 65%. I'm using % for the example but, if you use the actual Heart rate, it's the exact same thing.
