I’m in the 2nd season of using TFTNA and TFUA to train for Mountaineering. I saw a big improvement in my fitness last season, but am doubting if I’m approaching aerobic base building correctly. I was so out of shape prior to all this that doing just about anything probably helped and now I feel like I’m reaching a wall in aerobic fitness.
To train my aerobic base, I walk up and down as steep of a hill as I can find in the mornings in a fasted state while trying to stay under AeT. After more reading, I realized my respiratory metric is not accurate enough to to correctly define my AeT and I should perform a drift test as laid out by UA. This is likely part of the reason I’m feeling that “wall”, because I’m actually spending portions of my sessions in Z3.
Is it better to build aerobic base on flat/slightly hilly terrain where it’s easier to maintain a consistent HR and trust that the ME portion will take care of my legs during the uphill? Or was it actually a good idea for me to try to make my aerobic base building sessions as specific as possible by using a steep(ish) hill?