According to measurements done via the body mass index.  Of course, the BMI measurement is so generalized and full of problems as to be almost totally worthless.

But seriously.  How did parents ever raise healthy children before they had groups like the Knowledge Network around to tell them how fat their kids are?

I think this childhood obesity stuff is a load of bunk.  It’s just another excuse to meddle in our lives from the busybody nanny statists.