Today we opened our local paper, The Washington Post, and read about a recent study that urges area schools to increase exercise requirements. To us, this read a little like "Sky Is Blue, Study Says." But as the national debate over obesity indicates, that Post story is probably news to many. The prevalence of obesity among kids aged 2 to 5 and 6 to 11 more than doubled since the 1970s, according to the Centers for Disease Control and Prevention. For adolescents between the ages of 12 and 19, the prevalence of obesity more than tripled. There are just two possibilities: Either kids started eating more, or they've been exercising less.
