I’m currently setting up my zones based on LTHR and going off of a recent 5k my max HR was 204 and I averaged 197 over the last 20 minutes. A previous 5k had the same average so I don’t think its a glitch.
I’m 34 with a resting HR around 67 and I just want to make sure that seems reasonable as it puts my HR zones quite high
It’s high, but not unreasonably high. However, it’s possible that our 80/20 HR zone system may have an upper accurate limit. For example, your Zone 2 is now 160-177. 160 feels so high for Zone 2, but it may not be a problem.
I would validate this against Pace and consider using Pace instead, which I’d recommend independent of a high LTHR. What was your average pace for that same 20 minutes? Plug that into the zone calculator and get a set of Pace zones. Then, run at 165bmp (low Zone 2) and see how matches to Zone 2 Pace.
That’s more of a act of curiosity, I’d still switch to Pace as your primary measure regardless.
Your Pace and HR are aligning, so stick with those zones until your next test! Nothing wrong with a high LTHR, everyone is different. I just finished corresponding with an athlete who has an exceptionally low LTHR of 139 on the bike. Just the way we are individually built.