Its not hard to comprehend....
He responded well to EVERYTHING....its not like he had shitty genetics to begin with.
I am SURE he right out the gates responded awesome to CONSISTENT LIFTING, EATING and DRUGS.
It is what it is --- (hate that term but its necessary).
the receptors, the metabolic rate, the fascia, the joints, tolerance, the innate abilities were all there....just like every awesome looking physique,
-FF