[Seth Keena]

Hi Training_for_something,

Thanks for writing in. I understand your frustration.

To get to the point: There is probably not one easy answer for what’s going on here and I urge you to have a short phone call with us so we can get more details and get you pointed in a helpful direction; doing so will probably be rather efficient for you. I don’t typically advise such things on our forum, but your situation is a bit unique. Perhaps the below questions can help… https://evokeendurance.com/talk-to-a-coach/

What age were you 4years ago? After a certain age our AeT and max HR decline with time no matter what training we do, sadly…

Were you doing any intensity (Z3 / Z4) during these several years and if so, how much?

I do not know if the stimulants have an affect on the test or now. Lightheadedness with high-efforts/high-resistance can be from a multitude of causes and might be related to the declining AeT or might not.

-Seth