wjcdean – Welcome to the Uphill Athlete forum!
So the aim of curing ADS is too push the AeT up to a higher heart rate? Or is the AeT relatively fixed, and the aim is that my pace will increase for a given heart rate (that is below my AeT)?
As you train to cure ADS, you should see an increase in AeT and an improvement in pace at a given heart rate.
Can I get away with judging my AeT by just nose breathing while hiking/power walking/jogging until I get a heart rate monitor and GPS watch?
This article explains different tests and their pros/cons. If you are not well trained aerobically/have ADS, then nose breathing test won’t be accurate.
Once you have the gear you can do the heart rate drift test. In the meantime, you can do low-intensity aerobic runs/hikes.
Hope this is helpful.