As someone who does a fair amount of unplanned walking (often quite slowly) I’m curious about this as well. I’ve updated my default threshold to a fairly high number but my walk loads are still 2-3x what I get from Garmin or intervals.icu (HR based).
I saw this post recently where Andrea mentions walking does not use the default threshold… Incorrect threshold heart rate notification - #3 by Andrea if this is true can the walking threshold be exposed so athletes can modify it, or something like that? Just worried that this could be overestimating my fitness/fatigue