against peers and since one in three children is overweight or obese, doctors say that's not a healthy comparison. >> charlene makes it a point to talk with her pediatrician where her kids sit on the size chart. >> i feel like a lot of parents should communicate with their doctors. >> and that's good advice for any parent along with making sure to incorporate plenty of healthy fun like the west family does. >> we do go to the park we play outside. you know lots of different things and even though some parents wave off the extra weight on the preschooler, arguing a chubby child will grow out of it. research shows overweight kids are more likely to stay heavy as teens and adults. >> change the whole trajectory and this is an important time to intervene to make sure children are living as healthy as possible. >> reporter: the prescription