Seth, I think I was frustrated and spoke too soon in my post. Sorry. I think it just took 30 min or so during my OP’s walk for the hr to get up to its steady state level, what do you think?
today I tried an actual drift test on a treadmill at a constant speed, walking on an incline. Had jaw surgery a few weeks ago so can’t run yet. Warmed up 15 min, then started the test. Average heart rate of 122 and it actually drifted down in the second half. I found out about the polar beat app’s ability to show avg heart rate over a range, so will start taking advantage of that. It’s probably likely the drift test will correlate with my lactate test heart rates, looking at a couple of my old runs before my surgery, that seems to be the case