My wife is a workout beast. Maybe you have seen the pictures on Facebook. If not, take my word for it. Her mother and grandmother are thin, too, so she has genetics going for her. In fact, a genetic risk of obesity is a disadvantage even for those who do work out like Sara "Beast Mode" Ettl!
Fox News reports that University of Arizona researchers took DNA samples from 84 women ages 30 to 65 and examined them, focusing on genes linked with obesity