What johnny doesn't mention here is that your stomac shrinks with low carbing like that, so don't go crazy with the carbing up when the day comes because you can't almost breath, and your training will suck ass after that because your blood sugar will be very unstable.
Secondly, the "carb up" is only to restore your mental health
, but if you can go on with that, then do it, the insane pig fest is not necessary, it's only "for the treat/reward" of your strong willpower of not eating carbs. But what are you, a child?
Secondly, eating a little carbs keeps your blood sugar stable day in and day out so it's only natural to feel more energetic overall.
welcome to the endless circulation of information about low carbing