See, I'm the type of geek that subscribes to the ol' Marvel No Prize way of rationalizing stuff. When it comes to Cap, yes, stats say he's anywhere from 220 to 240. And that is absofruitly what a common 'pro wrestler' is at. But i'll use my 'No Prize' comics logic and correct the inconsistancy to say that the Serum maximizes the effectiveness and strength of his muscles and tissues and thereby renders them much denser than that of a nomal man his height and somewhat coresponding build. Boom:The character wieghs 240 whilst looking like a gymnast. (asgardians are actually said to have denser tissue in the comics, explaining some of their quarter tonnage weight)
I've explained it to myself. I'm happy. Now let's hope Evans channels and refines what he had in Sunshine, and we'll be square.