I finished SusPB-HV yesterday and really struggled throughout the whole plan, which is somewhat odd since I tend to favor sustained efforts and didn’t have much of a problem the previous time I did it. I felt very worn down and mentally tired of intensity. I looked back through my training history and did SSB-MV between build plans, but then realized SSB-MV is more like a build plan and that I had been doing intensity without any real break since July. While six months of intense training may be normal for some, it was a huge step for me from what I had been doing for the seven months prior on TR and eight months before that on another program. Anyway, I’m changing tactics and going with SSB-HV and will change out the Wednesday one-hour sweet spot ride for endurance if needed.
Looping back to the topic of this thread, I switched from a custom mix from Infinit Nutrition to a homemade brew about a month ago. The only thing my homemade mix lacks that Infinit does is caffeine (about 40mg), but I can remedy that with Nuun+Caffeine tablets or just adding caffeine capsules. I don’t think the lack of caffeine by itself was a reason for my struggles, but I’ll continue to experiment.