I`m a bulgarian woman and I can tell you this: We eat very little, not only because we want to be thin or sth..we just can`t eat a lot, we can`t stuff ourselves with a lot of food. Even the thought of eating too much is disgusting. We do train, believe me. For example, we walk by foot( better than using a car), do jogging, do aerobics, sometimes go to the gym. In one word, we really watch our weight(of course there`re always an exceptions). Еventually it`s mostly because of our genes. :))