Hi Team
I’ve done three HR Drift tests trying to find the correct AeT HR. I’ve had confusing results so though Id post hear for advice.
Test 1 – HR135 – Drift 1.07%
Test 2 – HR140 – Drift – 1.59%
Test 3 – HR145 – Drift – -0.34%

1&2 were on the same route, seaside path, reasonably flat.
3 was around a flat path in a park.

Test 3 was completed this morning. This week has been an easy week in my training where I have dropped volume. I have been running easy for several months, building up again after a cycling accident in January. No interval training, just steadily building volume back to my average 40 mile week.

Is a drop in normal volume enough to give a negative drift result even at the higher 145 HR?
I plan to run another test next week at HR150 in the same location as test 3. Is this the correct next step?

Thanks for your input.