Anna, I sort of agree and disagree with you at the same time. Go figure... What makes HR go up higher and higher with every set during A+A session? I think it is the gradual rise, or accumulation, of lactate. So if the goal is to keep lactate under a certain level then maybe certain HR rate limit might be meaningful to observe. I don't know. What is the HR number is another question altogether. I am pretty much thinking aloud here.
I agree with you there. Let me clarify using this HR track as an example (and here is a link to the session on Polar). Here I did 30 repeats of (5 snatches R, rest, 5 snatches L, rest, with 20, 20, 20, 24, 24, 24, 28, 28, 28, 28, 28, 24, 24, 20, 20 kg) for 150 total snatches in just over 40 minutes. (The 2nd video in this Instagram post was from this session). I was resting long enough so that my HR didn't elevate above 145 or so as the session progressed, which would have indicated an accumulation of lactate. But, I did not worry that my HR elevated sometimes 40 bpm from one repeat, or that it got above 140 (my MAF HR would be about 130) from any one repeat, which is what I meant above when I said we're not "trying to keep the heart rate under a certain threshold", or as Daniel said, "heart rate goes down enough that I know the next interval it won't go over my threshold". If I was doing that, I might wait until it got down to 90 before going so that it didn't get above 140... but I'm not worried about that. Does that make sense?