Jest Chillin
Member
Yeah this is not true, sorry (again). Cap is described as peak human in most sources, and his feats are not meant to push him past that aside from comic book silliness. At best you can argue for conflicting messaging on this front, at best, but even the movie pretty much went out of its way to not make him appear super human. The super soldier serum made him peak human, and that means the peak of what a human is capable of genetically speaking any feats that he does are merely the result of that status. You could argue superhuman within the realm of his particular level of peak human being pretty much impossible to practically obtain (but still possible in theory), but that is about it.
Olympic level athletes have not perfectly trained their entire lives (which is the equivalent of the super soldier serum) nor received a drug that basically configured them to optimal human potential. So of course (in conjunction with comic book silliness) Cap will have feats that surpass an Olympic athlete. We are still breaking records as training becomes more comprehensive.
And honestly, Cap not being a superhuman is a part of what makes the character compelling to a lot of his fans. He is not superhuman, which makes his drive and struggle all the more potent, and better reflects his own accomplishments as our own potential.
As for cap not aging quickly, again, optimal genetic potential, We are starting to understand aging from a scientific perspective, we know what causes the accumulation of errors in cell division, and we are starting to figure out how to slow those processes. Some people age much better than others.
The movies haven't shown him as comic level of superhuman and he doesn't commit feats the likes of Thor and Hulk commit but he's still well beyond Peak Human. Jumping out of that plane with no chute, even if landing in the ocean, would seriously injure (perhaps kill) any human being, peak condition or not. Single handedly destroying an advanced air ship is well beyond the capabilities of a peak human as well. In combat, we don't even know to what extent he's exerting himself since his goal is almost always only to incapacitate his opponents.
His aging is hard to quantify in the MCU, since he's only been thawed a relatively short time. How they choose to handle that is anyone's guess but to my understanding it's well documented in the comics. As far as the MCU goes though, any assertions in either direction with regards to his aging are speculation. We can't say definitively if he's got super slow/stopped aging or that it's optimal genetic potential.