I did the HR drift test last night, did a slow jog for 15 minutes till my HR was at 156 (what I had been using as AeT based on Max HR tests from Garmin). After warm up (which is in the recording) I tried to keep my HR at 156 for an hour (5 miles and only 85ft of gain, so pretty flat). Selecting the last hour to exclude the warm up I get a Pa:Hr of -2.49% – which according to the instructions means I started too low. I can definitely rerun this and see, but base on all the example numbers it seems like 156 for AeT is already on the higher end, so bumping up even higher makes me wonder if I’m doing something wrong. My average for pretty much any given section of the run is right at 156, so it seems like I kept it pretty consistent with my starting/target HR.
My run last night on TrainingPeaks
I’m 33 years old, male, 6ft/200lbs