to be fair to him that type of atalakus when they are recording tend to shout way more than what we hear in the mixed version with music behind,you'd be shocked to hear how genta and gesac for example shout before mixing and all that manage to make it "softer"
and then their discipline does not help,thats why i respect somebody like cnn,he managed to stay exactly in the same shape just his face got older and he has dreadlocks,discipline is the key