Remember the cool girls, huddled together in high school restrooms, puffing their cigarettes? Well, here’s consolation for the nerds in the crowd: Those teen smokers are more likely to experience obesity as adults, according to a new study.

Girls who smoke 10 cigarettes per day or more are at greatest risk, particularly for abdominal obesity. Their waist sizes are 1.34 inches larger than nonsmokers’ waists are as young adults, according to the study in the February 2009 issue of the American Journal of Public Health.