Note that the body of a veteran fighter is not in question here.
Rather, it's about reaching the combat strength of a veteran fighter solely by means of the flesh!
The two concepts are completely different.
At the fighter level, all fighters boast Qi that is significantly superior to their physical bodies. Even the ultimate fighters' flesh is probably on par with Casio's current state, or even weaker. How did Casio manage to corner Ghost Knife alongside Feng Liusi and Sheng Feinan? It was his physical endurance and resilience, although his destructive capabilities came in handy too.
"Finally, I have recovered most of my strength..."
