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"Fewer than half of adults in the United States meet the recommended physical activity guidelines set by the Centers for Disease Control and Prevention. Often physical inactivity may be associated with overweight and obese individuals, but even healthy, normal-weight Americans sometimes fail to meet physical activity guidelines. Now, University of Missouri researchers have found that simply encouraging healthy adults to be more physically active can improve their cardiorespiratory fitness (CRF)."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2013-12-healthy-adults-physically-cardiorespiratory.html>