Since a few weeks the training effect labelling on the Garmin Edge1030+ plus is totally wrong again.
I have done several indoor rides in Octber and November where the majority of the time was spent in Z3 and still it's labelled as "Basic" so the High Aerobic is now totally down to zero. This is absolutely very wrong!
Exactly the same indoor rides done in March of this with all parameters (like HR-zones etc) equal were labelled as "Tempo (High Aerobic). See screenshots hereunder:
In TrainingPeaks I can see that both exercises have the same Intensity Factor so the 13-Nov exercise should be labelled as Tempo just as the 04-Mar one.
This issue was there about 2 years ago due to a SW release with this major training labelling bug. It seems that this SW branch is set live again. A very poor routine of SW release management which is often seen @ garmin.
Get this corrected and remove the word 'accuracy' from any of the websites as it's not accurate at all. Training load and performance overviews are regularly made useless because of these major bugs in SW (release management) and spontaneous device resets during exercise.