So you see that you were mentioned in my other thread.
I didn't know that Christian had this kind of training. Without diminishing the man, as he is incredibly smart, it is basically almost identical to the DC training that I'm doing.
Obviously, I seem to have run into the same kind of problems that you are having.
I'm somewhat convinced because this is not my first time running into this, that this has to be some kind of central nervous type fatigue.
You see, each time this is happened to me (maybe twice in the past), it was as though all I needed to do was eat carbohydrates to get over it.
And although I can't find any kind of articles for you, I know I did read something somewhere that said that serotonin, the central nervous system, and Muscle Recovery we're all very very closely related.
So for me, after two days of eating kind of junk, I feel 100% recovered.
Maybe that helps, maybe not. I wouldn't go changing the actual parameters of the workout program but that's just me.