Fitbit app not showing VO2 Max data

[Hituts]

Hi

I have been using charge 4 for a few months and almost never take it off unless it needs charging. I can see my cardio fitness score in the app but when I click on the arrows to expand, I get a message saying "wear your fitbit tracker with HR enabled and log exercises qith VO2 max". I am not sure what to do as HR is always enabled and I use my tracker to l9g exercises (usually running). Any suggestions?

Moderator Edit: Clarified subject

[SilviaFitbit]

@Hituts Welcome to the Fitbit Community. Thanks for the details mentioned. 

In this case, I'd like you to log out from the Fitbit app, force quit it, log back in and check if it shows your VO2 Max data. As always double check that the latest Fitbit app is installed on your phone. 

Your cardio fitness score is determined by your resting heart rate, age, gender, weight, and other personal information. For best results, make sure your weight is correct in your Fitbit profile. Also, wear your tracker or watch to sleep for a better resting heart rate estimate. Your cardio fitness score will be shown as a range unless you use GPS for runs.

Let me know how it goes.