http://articles.mercola.com/sites/articles/archive/2006/01/14/youth-at-risk-one-in-three-kids-not-physically-fit.aspxMore than a third of U.S. adolescents are physically unfit. This means they are at greater risk of getting heart disease as they age. 34 Percent More than 3,000 adolescents were asked to walk or run on a treadmill, after which their heart and blood pressureenCommunityServer 2008.5 SP1 (Build: 31106.3070)