Cardiorespiratory Fitness Is Strongly Related to the Metabolic Syndrome in Adolescents

The metabolic syndrome is a predecessor of type 2 diabetes and cardiovascular disease (1). In adults, physical activity is important for both preventing and treating metabolic syndrome (2). A limited number of studies have examined the impact of physical activity on metabolic syndrome in youth (3–7). The results from the few existing studies are conflicting, reporting no associations, weak effects, and strong effects of physical activity (3–7)....