"physical fitness is not only one of the most important keys to a healthy body, it is the basis of dynamic and creative intellectual activity. Intelligence and skill can only function at the peak of their capacity when the body is healthy and strong."- president John F. Kennedy 

I can't agree or disagree, since it does really depend on the physical preference of the person. I believe that it all goes back to the person since if their physical appearance does affect their school work they should change it, we shouldn't be the one telling them otherwise. Although you could say that i have a normal physical appearance i do get tired quickly, i do think that it affects my school work. I don't think people should tell people with a different physical appearance to change their weight or make fun of them, I believe that its their choice. Some people don't have to be fit in order to be smart, iv'e seen lot's of people who are smart but are not fit, but iv'e also seen people who are not fit and very lazy. So i think it's never a agree or a disagree.