This was all recorded with a chest strap HRM (Garmin dual)
Hi all, looking for some info or experience in interpreting these results. I did the AeT heart rate drift test on a running track. After trying at my MAF estimate previously (~150 bpm) and failing around 36 minutes with a heart rate of 180 bpm, I decided a much more conservative estimate of around 130 bpm. I did over an hour of running trying to keep my heart rate between 130 – 135 bpm, which was surprisingly tricky. Even thinking about a trad climb or when a RATM song came on I would start going a bit faster without noticing. Overall I think I did well, I was able to nose breathe the entire time and kept my heart rate at a 134 bpm average, and felt like I could have kept going for another hour if I had to. However when I look at my Pa:Hr drift %, I got 6.8% for the entire run (Pic 1). Curiously, almost all the change was in the first half (Pic 2) with 8.2% drift, and almost none in the second half (pic 3), with only 0.8% drift. The second half having such a low drift % even with the same Hr average as the first half is confusing to me and not something I’ve read about happening. Was I right at, above, or below my AeT?
Do I need to re-do the test? Or can I just assume my AeT is ~140 bpm based or perceived effort and go from there?
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