[Seth Keena]

Hi,  Beemer2012

Thanks for writing in. I have seen some people with AeT much higher than MAF would suggest. Per your qualitative data from running at 160, it would not surprise me if your AeT is close to this. A resting HR of 50 seems low-ish for such potentially high AeT. But, you can do a few things to eliminate some noise and to otherwise consider.

-Try washing the HRM strap and sensor with soap water. Lick the sensor before applying to your chest (saliva is a good conductor.) Maybe change the battery if off. Also, borrow a friend’s HRM and compare.

-Do the test on a treadmill rather than outside. And, do it first thing in the morning without food (caffeine is ok.)

-If you’ve not already, do and AnT test. Likely 60min at sustainable-hard. This gives you a threshold that is going to be at the least your AeT(extremely unlikely unless you’re elite already!) and likely above it.

Lastly, consider that if your AeT is 165bpm and you AnT is 175bpm, for example, you’re not too concerned that AeT is so high and probably pretty hard to sustain; it’s time to polarize base training to upper Z-1/low-Z2 and Z4, without much volume between, generally speaking. This is the reality of an aerobic threshold high enough that muscular effort to sustain it become heavy and degrades intensity workout quality and limits your overall base volume. Basically, running at AeT becomes intensity (and you can do AeT intervals.)

Do the actions above and consider the above as well. Also, consider what you’re training for – do you need to focus on upping  AeT and by how much and in what modality?

Hope this helps,

-Seth Keena