

Pace based easy run turned into Threshold run
So I'm doing a challenge goal it set for myself, where I want to run a 10k in 1h, with a garmin coach program from coach greg, and today was an easy run which was pace based. Now in the past, I only did HR based runs, since I live in a very hilly area, where I thought it's easier, since you can slow down to make sure you don't run too hard. Now in the coach program I have to run with pace goals, which was definitly a new thing for me. I always tried to hold to pace, no matter where I run, not intentionally slowing down, and not having my HR visible on the screen.
The pace itself wasn't to hard, frankly quite doable, only on uphills I was sometimes a bit too slow and it was harder to maintain.
In the end Garmin rated the workout as high Aerobic and Threshold with 4.1 intensity, although it was supposed to be easy run. It wasn't easy run, but at mostly medium.
Looking at the HR chart, the HR mostly stayed in the green zone, only getting in Z4-5 when the uphills were kicking in.
I suppose, once my body will get more used to pace based runs and running up hills faster, that this will fix itself and easy runs will be marked as low aerobic, like they should, just wondering if anyone had similar issues when starting with pace based runs instead of HR based ones.
And yes my HR Zones are calculated by LTHR and the LTHR is set correctly.