Kids can be cruel, especially about weight. So you might think overweight or obese children know all too well that they're heavy — thanks to playground politics. But that's not necessarily so, according to government data covering about 6,100 kids and teens ages 8-15.
About 30 percent "misperceived" their weight status (underweight, normal weight, overweight or obese), according to a report from the Centers for Disease Control and Prevention's National Center for Health Statistics. (The CDC bases those categories on body mass index, adjusted for gender and age.)