One of the major advantages of my 4-day split is that when I have sufficient time to do so, I'm able to simply continually rotate through the split. Currently on my 10th consecutive day in the gym, and feeling great. I've seen some of my weights slide going from 5x5 to 3x8 simply based on the extra three reps inducing more fatigue, but that could also be partially due to the low carb diet. Probably my biggest challenge going forward over the next 2 weeks is going to be resisting the cookies my wife baked. Twenty grams of carbs a piece? Madness!