Hello, first time posting on here and am hoping someone may be able to help me. I recently upgraded me Fenix 5 to a Fenix 6 Pro Solar. When it arrived I added it to my Garmin connect profile and started using it. Now what I didn't realise is that this watch had been bought by somebody before me, set up and used for a bit, before being returned! I complained to the retailer and they refunded me some money but when I synced it (thinking it was new) it overrode my information on Garmin Connect putting me as a 30 year old female when in fact I'm a 39 year old man!! I think I've rectified everything but my heart rate zones are now significantly different than previously on my Fenix 5 and I assume its related to this?
For context my RHR is 57 bpm and VO2 Max is 49.
on my Fenix 5 - Z1 was 106-109, Z2 was 110 - 144, Z3 was 145 - 154. etc
on my Fenix 6 the zones are massively different - Z1 is 90 - 107, Z2 is 108 - 125, Z3 is 126 - 143. etc
obviously these are now much lower than they previously were. I do quite a lot of Z2 training so this has confused me and I'm not sure what to do or how to rectify it? Would doing a threshold test on my fenix 6 sort this out? Any help or suggestions gratefully received.
Regards
Graham