Ill keep it simple and concise bro. Theres a lot more to it and you can read up but in the most basic form.
Muscle growth take muscle damage and Muscle repair and well adaptation to the stimuls you put on the body but we'll keep it at it takes damage and repair.
Muscle damage, gym work, takes minutes. Muscle growth on the other hand tkae a LOT of time, protein turn over the flushing out of the old tissue the building of the new, which takes a lot of energy (food) and rest ( sleep relaxation, time out of the gym)
the problem with your idea is your only supplying that needed fule for a few minutes post w/o. while sure that may blunt the initial cortisol raise and start an anabolic effect you need that to last a LONG time as in eating hyper caloric in order to make any real drastic change in muscle size
thats VERY simple but the gest of it.
Growth needs a few minutes of HARD ass work and LOTS more hard work behind the fork and resting out of the gym