Got a garmin venu 2 this summer. I'm 34 years old, and the unit let me know that my achievable fitness age was 28.
After working out for three months, I reached this age. However, now I have surpassed it, and have achieved 27.
Lower than what can be achieved.
This clearly seems like some miscalculation, or at least misinformation.
Having a look at the raw data returned with the graphs:
I think that either the achievable fitness age needs to be updated to follow the calculations actually done, or the achieved one needs to stop at the achievable number.