Speaking from the overweight-and-never-loses-weight-no-matter-what crowd, I can say that whatever is going on with 'nutrition' these days is killing us. I'll wake up starving, take two bites of something, and not be hungry anymore. I put it away, and I'm hungry again. It's like food makes me feel sick to my stomach, I don't know why, and I can't afford a doctor's visit. What's worse is that I'm not even losing any weight from eating like a bird. I'm 5'1" and 200 lbs(give or take ten pounds, our scale isn't calibrated right). I've been trying for two years to lose weight to no avail. At one point I was doing military style physical training once a week(rigorous as hell), visits to the gym another day a week, walking to and from school every day(now that I'm out of school, it's work), and cutting down what I ate, and I never lost a pound. If anything, I gained weight. After many other 'diets' I've tried, I've given up on diets all together. I eat whatever happens to be in the fridge, and I stop eating when I'm not hungry. ((I've gotten a lot better at telling when I'm eating because I'm hungry and when I'm just bored.)) Still, nothing changes.
So, it's not just immobility that causes obesity. I don't think I'm obese, but I am fat, and it's soul crushing to see how people look at me just for eating, for doing something all humans need to do, even when it's just a few pieces of sushi or a half a sandwich on my lunch break.