You guys are funny. 2 points:
1. You don't see fat people at b-school because fat is largely a product of socio-economic standing. My good friends from the trailer court aren't going to be joining me at b-school -- they're too poor, have no opportunity. And their main choice for food is the stuff you can get from McDonald's and company, plus convenience stores. For many, particularly in urban areas, grocery stores are simply unavailable. The American fat epidemic is led by our down-trodden, but those of us with more dough are doing our best to catch up.
2. I am HOT. I started teaching aerobics in the spring, and have turned into a little mass of muscle. What sucks is that some clothes I bought in the early fall don't fit anymore so I had to make a last-minute shopping trip to find some duds for my interviews. And then I bought some other stuff cause I am so damned skinny I couldn't help myself. I am going to do my damnedest to keep teaching once school starts. It's the best way to make sure you actually go to the gym -- you have to.