America's weight problems are now so well-known they're even fair game for jokes at the Oscars. "Americans really know how to fill up a seat," jibes Ellen DeGeneres, host of the 2007 Academy Awards. The statistics are alarming. Sixty-five percent of Americans - 130 million in 2001 - are overweight.

Recent discussions in the scientific literature are focusing on monitoring and possibly improving cardiovascular health in children. There's been a lot of conversation and a lot of controversy. An article in the Journal of the American Medical Association1 argued that universal screening of children