When I upgraded to the Fitbit Charge 2 in September it also measured cardio fitness (related to heart rate).

At first I was in the 34-38 range and then a few months ago (likely soon after when I recommitted to weight watchers and working our regularly) I got up to the 35-39 range.

Well today I checked and saw I moved up to the 36-40 range! I’m so close to moving from average-good to good-very good!