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#140535
Avatar photoScott Johnston
Keymaster

Part of the problem is that you used two different tests to determine your AeT.  I would recommend repeating the same drift test as you did 18months ago.  I would also recommend re-doing the drift test more frequently or anytime you see an increase in pace for the same HR.  Or you could use this lactate test as the base line and re-test with lactate every 4-6 weeks of consistent training.  Lactate is heavily affected by what you have eaten in the few hours before.  Also it is important to be consistent to see improvement in AeT (as it is with any training). If you have had breaks from consistency in the past 18 month that can explain a lack of progress.  We normally will see quite significant gains in either HR or pace during 18months of consistent aerobic base training (on the order of 10-30%).

I hope this helps,

Scott