In the past month, I’ve finally started HR training and thought I had my estimated AeT pinned down. The top of my nose breathing limit for flat running, <10% incline running, 15-25% incline walking is consistently at 159-162. On Green, this pace was 56min over 2338vert, and at 140-144bpm, pace was 1:07. Just about linear pace/HR. However, when doing the Manitou Incline, my nose breathing limit is 169-172. This pace was 37min, which I did on the 1st and 4th lap, and could have repeated over again with no problem. It felt same RPE as the 159-162 does on all other terrain. However, dropping 10% off this pace (to 154), my pace dropped to 47-48min. Clearly, non-linear (>20% difference). My usual fast pace, lets assume AnT, on the incline is 33 minutes, which seems about right as far as AnT vs AeT (33 vs 37 ~10%).
I’m going to assume AeT is the 159-162. But, my question is, what is different about the incline? Is it just that it is anaerobic in nature because of the big steps? Could it be that my calve muscles are not as efficient as my big movers in the glutes/quads, which limit the other activities more than the Incline? Should I treat 169-172 as AeT on the incline and 159-162 as AeT on all other terrain?
I will hopefully be getting a test done next week on my deload week to sort things out officially, but I do train on the incline frequently so I’d just like to know if maybe I should treat it differently. Because there is no way I could keep the pace at 144 (10% below normal AeT), as 154 already felt like I was barely moving.