It depends on your training volume and if you have ADS, but I think the general recommendation is to do AeT test every 4-6 weeks.
Here is a forum discussion on this topic that you might find helpful.
Have a quick question; I just did an aerobic threshold test today and my Pa:Hr was less than 3.5% (2.49%). How long do you recommend waiting before retesting?
Posted In: Mountain Running
It also depends on the gap between AeT HR and AnT HR. Have you done an AnT test?
I haven’t done the AnT test yet, I was planning to on Tues. 2/9. I was wondering if I should retest for AeT sooner since it wasn’t in the suggested 3.5-5% Pa:Hr range (it was at 2.49% on Tues 2/2)? Or just adjust HR up slightly for it until the normal 4-6 week retest?
It looks like your starting average HR was about 143? You could just use 145 for your AeT until you retest next.
When you do retest maybe try for a flatter course or try to keep the elevation change the same for the first & second halves. It’s not a lot of up and down but you did do most of the uphill in the first half which could affect things — but it wasn’t much. TP does tend to exaggerate the elevation change.
Thanks for the replies. I’ll do the 145 HR suggestion and retest at beginning of next training block testing at a higher HR.
Unfortunately that is the flattest terrain I have and will use pretty much the same route on the next test for consistency.