Truth is that most Bulgarian women do not exercise. (or at least didn't used to, going to the gym is slowly gaining popularity) Many of them just eat very little portions of food maybe 2 - 3 times a day. But even those who eat normally, like myself, eat good Bulgarian food. We eat plenty of fresh produce, yogurt and even though we indulge in pastries sometimes (banitsa) it's so delicious and filling that you won't eat too much. Portions are smaller in Bulgaria and we walk everywhere as someone above had mentioned. I've been living in the US and exercising 6 times a week, and yet, when I go back to Bulgaria I drop a couple pounds without even trying. Of course, genes have to do a lot with it too. I've been thin all my life. The "heaviest" I've ever been was my first winter in the States when I weighed 125lb (56kg i think). I usually weigh around 51-52kg.