Over the past decade, rates of obesity have been pretty stable for American kids 6 to 18 years of age. But over the same decade, the fitness of American kids has declined significantly, even though the average kid hasn’t gotten any fatter. In 2014, researchers at the Centers for Disease Control and Prevention (CDC) released the result of a study which compared the physical fitness of 12- to 15-year-olds in 2012 with 12- to 15-year-olds back in 1999 and 2000. They found that the average fitn...
