If SSBLV1 -2 is only 3.5 hrs/wk then you are going to hit the wall pretty damn quick. A 3.5hr week is not actually 3.5 hrs anyway when you consider a “proper” 15 - 20 minute warm up for each session. Nowhere near enough TSS to get to the upper levels and the worse part is you are not building any REAL aerobic base and VlaMax is probably being pushed up as a result, considering the SST + Vo2 stuff. A plan like this places a premium on the glycolytic system to compensate for not building the FatMax system. If you are looking for 4 - 5w/kg…a 3.5 hr plan ain’t it. Even the high volume hours seem low for the best aerobic engine development.
I used to be the Sweet-Spot king for about 5 to 6 years and when I finally switched to Polarized I started to move the needle. I will never go back to threshold-centric riding again. Eventually…on limited hours…it is too much pain for too little (even none) gain.