[Scott Johnston]

Remember that any “stock” plan is a sort of one-size-fits-all, which often means it fits no one perfectly. This is especially true when it comes to aerobic volume. Due to injury concerns, we will always err on the side of caution. You should continue the aerobic training at the volume you are accustomed to.

Another thing to consider is that in most of our plans we do not use the Training Peaks workout builder. That’s because, for aerobic base runs, it seems rather like massive overkill to use workout builder. I mean, how hard is it to remember something like “run for 60 minutes at aerobic threshold, right? Now, if there is an internal session, then workout builder can be quite handy, especially if the work rest periods vary in duration.

In your case, since you are at a much higher running volume than this plan calls for, you should not increase your weekly volume by 20%/week The higher the running volume, the slower the volume progression must be. To avoid injury when you are already doing some 1:45 runs I suggest keeping the increase to more like 5-10%/week

I hope this helps.
Scott