Cardiorespiratory Fitness Is Strongly Related to the Metabolic Syndrome in Adolescents

The recent report by Janseen and Cramp (1), describing the independent associations between cardiorespiratory fitness (CRF) and the metabolic syndrome in adolescents participating in the National Health and Nutrition Examination Survey 1999–2002, addresses a critical issue related to fitness and chronic disease risk in youth. However, the authors’ findings and interpretation should be received with caution. First, the authors suggest that CRF is an objective measure of physical …