I dont think theres ever a time when amino acids aren't in your system.. . even if you havent eaten protein the muscle broken down will be cycling about and going back into muscle if it hasnt been burnt as fuel.. . I doubt youd get any bigger that way.. . no if its sarcoplasmic hypertrophy I dont know for sure but I dont think protein intake is much of a factor here.. . I think carbs are more important for that type of "non-functional" hypertrophy. ..