That’s a hell of a post Steve, and has to be the be the clearest concise summary of the different thresholds and HR zones I’ve seen. I’ll be saving that for reference 🙂
As sad as it is, I’ve come to the conclusion my test was completely useless for as measuring my AeT.
I’ve just ran a HR drift test targeting 155bpm (workout in Training Peaks: http://tpks.ws/FCJ5WJS677LBNTI4FEYTRMETSU), that being about where I expected to find my AeT going into the test. This came out with Pa:Hr of 2.73%, suggesting 160pbm as a more realistic AeT HR.
The AnT number from my test seems almost dead on where I’d have expected based on past workouts at 178 (I’d have guessed 180), so I’ll roll with that number for the time being at least. That still keeps me just outside the 10% difference between AeT and AnT, so I’m still just about in the realms of ADS.
Bottom line after all this is that I wasn’t far off before and just confused myself by getting a test which didn’t quite achieve what I wanted, even if it did shine a spotlight on my poor fat utilisation. On the up side, this has made me spend some more time thinking critically about what I’m doing, which is never a bad thing!