Since I added the edge 820 to my account (previously only F5), my age has changed (depending on how you look at it, I'm now apparently 5 to 10 years younger), when checking VO2max.
I do not understand why, and interestingly, I cannot find an age setting in connect, only in connect mobile where all of a sudden the birthdate was somewhere in 2002 - which is very flattering but definitely not correct. I'm pretty convinced that I set my age right when setting up my devices, so what's this now.
Also, I've tried to change the age via connect mobile and then syncing, and the VO2max indicated age continues to be the same - 10 years too low.