I did a lactate meter test and found my aet to be around 160 and ant around 173 (30y/o male with a few years of trail ultra running under my belt). I usually keep my aerobic runs to sub 144, and this heart rate up to 160 feels quite easy/moderate on uphills and I can keep churning the miles out, however on the flats this heart rate feels quite hard and my mind is telling me to quit. 150 heart rate on flats is about 4:30min/km. Is this just an efficiency thing? More efficient at running hills then flats?
Do I need to be running the flats slower, as my flat running aet would be lower then my hill running? Is there a way to do a HR drift test on a hill to determine my hill aet or will need to do another lactate meter test?
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