To me, people just follow the lifestyle of their parents. If they don't set an example of physical activity and only sit and watch TV, so will their kids. Parents get fat, so the kids get fat. Then the kids get picked on in school, have low self-esteems, and become suicidal. Well, in some instances that may be a bit of a stretch... but kids aren't going to do things if their parents don't set an example of it.
H-D