Thanks for the summary, but I just want to understand a few things
In Z2 - I can definitly talk 2 sentences without problems and I would say even more, so the bpm seems fine but with the pace of 5 minutes per km, I am not able to talk at all.
So this athelete zones just do not match. Now, do they get adjusted at a certain point as the trainings are not matching the expectation of Athletica ?
If I would now change to pace as the tool athletica is using to measure my effort, I would definitly be way tooo fast for a Z2 as I normally run a 6minutes pace at around 143bpm
The Garmin Connect Training plans were not that far away from bpm and pace as athletica is right now. Even though I did not like the training plans from Garmin (different story) but when I did them based on pace they did match to the heart reat and vica versa - Z2 or Z3 where quite close.
So even if the watch is not the gold standard, it should not be that far off as it is for me right now. Have a look at this tests Garmin Forerunner 265/265S In-Depth Review: AMOLED in Two Sizes! | DC Rainmaker and we are not talking about 10 to 20 bpm off.
For me, who has imported all the Garmin workouts, using the watch for years now, and did the 5k tt last week - this does not match. If it is off all the time, well, the table should be off the same way. But it is not that in-accurate as stated to justify this.
I am happy to let you have a look at my last 2 weeks (as I just moved to the paid plan) to find the problem, but for me it is not the watches heart rate monitor but more some “magic-logic” which is off and it would be nice to figure this out.
This is the 5k tt summary (part of it)
and I am not sure if my athlete zones and this 5k TT should match, for me it does not really, but let me know.
Also I did my last half-marathon in 2:17 and my goal is 2:14 this year in May - as I know my limits and I plan for the long game in running
and move my limits slowly while I am getting even older.