Maybe there's some kind of modeling that can be tedious, like catalogue modeling, but there's a kind of modeling, with runways or working with Richard Avedon, that's not very far from acting. Besides the fact that you don't have a partner to react to, the body language is the same.
I started modeling at 28. I'm 5-feet-7 1/2, and I never went on a diet. I followed what my doctor told me: 'It's good to have a little bit of fat. Your weight is fine. Don't go any lighter.'