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January 21, 2025 at 4:44 pm #140190

Karen

Participant

Hi again Seth

I did another AeT drift test targeting HR of 143, as you suggested. I did it outdoors (laps of a playing field – the only flat place around) because I couldn’t access a treadmill. I don’t have Training Peaks premium so I input my Coros watch lap data here https://runningversity.com/heart-rate-drift-test/

After a 20 minute warmup, I stabilised my heart rate at 143. Lap 1 averaged HR of 144 and took 29:37 minutes to go 2.79 kms. Lap 2 averaged HR of 143 and took 30:37 minutes to go 2.95 kms.

So, again, no HR drift. Question: does this mean my AeT HR is more like 150?

I will say that I could easily nose breathe throughout. Thinking back – prior to starting Zone 2 training – I could always nose breathe comfortably up to about HR 138. Question 2: is it possible that my aerobic threshold has improved after just 7-8 weeks of Zone 2 training (at 7 hours a week)?

Last week’s AnT test (30 mins hiking steeply uphill after a warmup) averaged a HR of 176. So if 176 is my AnT and my AeT HR is about 150, I’d still be aerobically deficient (and it feels that way to me). Since I’m 55 years old with a resting HR of 63, I just seem to have a high AeT and AnT – as you said, not fitting the Bell curve.

thanks

Karen