Lol…gold.
Taller students tend to be more atheletically oriented. There aren't many short football or basketball players. That's because height and size are important in those kinds of physical competitions. Since jocks don't tend to concentrate on studies nearly as much as other students, they're interest in academics is greatly diminished, and so they appear (or act) dumber. They may still have good minds though, and may be able to think through very complex strategies on the field. They have a differently oriented intelligence.
Shorter students probably won't be as physical. They'll then apply their intelligence to academics. Most people, probably including yourself, consider academic scholarship to be a greater indicator of intelligence, since it's far more readily apparent. A nerd's always gonna look smarter than a jock.
It's an interesting concept, the brain needing to use more of its potential on the body than being allowed to think more freely, but it doesn't work for humans. The size differential would have to be much greater.
There are some pretty smart fat kids here and there. They have a lot more body for their brain to worry about, yet they can be rather academic. That's because they concentrate on things more accessible to them, like books.
I know exeptions to every one of these tendencies. It's not really necessary to delve further into this since it gets weirder and wierder…and doesn't mean anything anyway.