I have not re-tested since November. I suppose that should be my next move. I haven’t done it because even my slowest jog still gets my HR above my previous threshold. As I understand it, if I am not near my AeT threshold (and therefore not dealing with HR drift), I should be able to find a pace where I can keep my HR around a desired target?
This was my first thought as well! In October/November, when I first started noticing this downward trend, I was about a month into the 6mo mountaineering training plan and so I was at probably ~8hrs/week. About on par with what I had done most of the year, and all of it under AeT. For the last 2-ish months (while trying to figure out my allergy and asthma situation), I’ve cut back to 4ish hours per week, all under AeT.
