No anaerobic effect

Probably just wrongly set power zones. Anyway, for the anaerobic effect you need short bursts of max effort, such as series of sprints, interval training, and similar. In the same time, the exercise must have an impact on the HR, so if the bursts of high power are too short to be detected by the HRM, then the effect won't be accounted for. Read more details here: What Is the Training Effect Feature on My Garmin Device? | Garmin Customer Support 

So the HR is an important factor too in this. I didn't know. 

Garmin estimated my HR to 189 which I highly doubt because i can get at most like 170 and then I'm almost finished so I think a more accurate HR max would be like 180 or mybe not even that.

I should figure out my max HR. 

Thank you! 

7959521 said:

I should figure out my max HR. 

Yes, definitely. Do a Max HR field test (there are plenty of tutorial for example on YouTube), enter it in GC, and disable the auto-detection,

Great!

I did yesterday. I can't say i blacked out or vomited but it was close so I guess I got pretty close to my max HR and it showed 177bpm.

Should i do a test on a bicycle too since I do a lot of cycling? I think the max HR maybe differ in different activities?

Regards Mikael 

Max HR is a physiological limit, so doing the test in one discipline should be sufficient.