Do high school girls really run like that at top speed irl? Slow/jog pace I understand them being a bit clumsy and wanting to looking cutesy, but surely at full tilt they don't flail their extremities all over the place?
I know it's just a gag, but running in a weird way like that isn't just a quirk; it'll eventually cause injury from putting strain on something, probably your knees, in a way it's not built to bare.