Is it actually at all official teaching that Adam & Eve were these superheroes that were impervious to age prior to the first human sin, or is this just something certain Catholics assume? The effects of original sin I thought were concupiscence and a wounded nature (i.e. mental & spiritual disorders, disease, etc.), not that they lost an alleged Superman status. The New Adam & Eve possessed the features of man prior to the Fall, and they seemed to have aged like normal human beings, and from the information in the Gospels, they were perfectly susceptible to pain & physical death, as well as fatigue and the need to rest and sleep. If this weren’t so, then Christ could never have been crucified. They seemed identical to historical man in every way, except in sin. Adam himself was sleeping when God created Eve, which suggests he needed to recuperate and such. Man was “good” prior to the Fall, but his body was in no way indestructible or inexhaustible (as the glorified heavenly body will be).
We know for a fact that regardless of sin or no sin, it was the ultimate destiny of man to be united with God in the Beatific Vision. Eden was never meant to be a permanent state, nor the total fulfillment for man. They were put there, with the full knowledge that they would be tested by Satan.