I must interject something. My sister and I were looking through some of my grandmother's stuff about two months ago. She had a box full of old pictures. There was one of great interest with respect to this thread. It was a photograph of my mother's 6th grade class in 1955. I counted 24 children and not a single one was fat. Not ONE. The school was in Panama City, Florida. They were Southerners and my grandmother put bacon grease in just about everything she cooked. Yes, they were more active. But, I think the picture speaks volumes.