[Scott Johnston]

Alex:

It looks like you did the test correctly and did the calculation right as well  148/141 give s a drift of 5%.  So your starting HR of 135 is your AeT and the top of Z2.

There are a lot of variations of the run/walk progression and you will need to determine the ratio or running time to walking time as you move through this. When you can run longer than 2 minutes without having your HR spike above 135 then you can extend the run time. When your HR drips below 135 in less than 2 minutes you can shorten the walking time.   The rate of progress will largely be determined but your run/walk volume and your genetics and age.  Be patient. It will improve and in a few months you will be a different runner and in a year you will be running 10-20% faster at AeT than when you started. It does work.  For more information on the drift test please refer to the following article.

Scott

https://evokeendurance.com/our-latest-thinking-on-aerobic-assessment-for-the-mountain-athlete/