Imagine this. It's 2086. An earnest young graduate student in anthropology turns on his camera, and turns to the stooped, white-haired gentleman sitting across from him.

"Tell me more about this game 'tag' -- how was it played exactly?"

"Most of you probably have seen the print ads or commercials for Dove's Campaign for Real Beauty. I think what they are trying to do is great,
and, unfortunately, necessary. "

This is from my daughter-in-law, who treats people with eating disorders in a center outside Chicago.

The first study to actually measure fitness levels in a representative sample of Americans is out, published in JAMA today. And there's no more room for denial: based on the results, about 20 percent of Americans aged 12 to 49 are out of shape and at greater risk of disease and early death. That's about 16 million people.