Until last week, in the Fitbit app, I use to have a Cardio Fitness Score around 54 in the range between very good and excellent. But since a couple of days this score changed a lot and now it's around 46 which is in the good level (and the range is not displayed anymore).
I don't get why this score changed like this in just a few days. I'm constantly training and meditate as usual. I didn't change anything of my habits. And I'm still feeling very good, fortunately 😄
Why this score changed like that? Any explanation?
