Thanks for replying, Garrett!
It looks like your test is only about 35 mins – you should make it an hour.
It was 45 minutes (I didn’t include the 15 minutes of warm-up in the activity I linked to and some of it was done off the track). I did this because I had read that a slightly shorter test can be useful if you haven’t been frequently completing runs that are >= 1.25 hours in length.
I’m planning to do an AnT test this week, but I guess I’m a bit confused. If HR drift is expected to be low at AnT and the goal of an AeT test is to run a constant pace at a constant heart rate, how do you know you’re running “easy enough?” Are there any other plateaus where Pa:HR is expected to be low? Or should I really just focus on the feeling that I’m running a pace I can keep up “for hours?” Aka, marathon pace?