[the balder rip was a joke, by the way. nobody gets me.]
that definition seems to eradicate the need for the "peak human" definition, which i often apply to cap and BP and similar types, because it makes "superhuman" attainable WITHOUT the outside influence. it also hinges on who or what you consider "ordinary." the most basic interpretation of superhuman, as far as i can see, is that it's "above human," or "beyond human" or "past human." if a normal human could accomplish as superhuman feat, without outside influences causing them to adapt [science, genes, magic,] then the feat just can't be considered superhuman. a human did it. it's within the realm of human ability. if lifting two tons was considered superhuman, but then a guy in sweden trained for his whole life and lifted 2.1 tons, that wouldn't make him "superhuman," it would make the feat "human."
but that's also a somewhat narrow look, depending on numerical qualifiers. for example, if someone was scientifically, genetically or magically altered to possess a certain heightened physical skill, but that physical skill was still attainable to a human being [running 25 mph, lifting such-and-such weight, etc,] they'd be superhuman under the definition of no longer being "just human," not in that they could accomplish more than a normal human could.
i understand there's chi and ki and all that spiritual stuff involved in martial arts, but that isn't mysticism or magic. it might, under some definition, be energy manipulation, but it's not magic. in marvel martial arts is a form of spiritual purification or physical meditation, but it isn't a form of magic. characters like strange who "learned every martial art" and can perform magic didn't suddenly start spitting out spells after a punch, or start kicking teeth in after a spell. they were two separately-learned crafts. they simply work in harmony, given the whole spiritual/meditative principle.
anyway, i still don't believe a physical ability can be learned by a human, and somehow make them "superhuman." either that person wasn't human to start with, there's an outside-influence, or whatever they're doing can't be considered "superhuman" anymore.
