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The influence of socioeconomic status on health-related fitness is not clear. Aim: To examine the influence of socioeconomic status on health-related fitness in adolescents. Methods: A total of 3,259 adolescents (15.0 ± 1.3 y) from the Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS) participated in the study. Socioeconomic status was assessed by the family affluence scale (FAS). Speed-agility, muscular strength and cardiorespiratory fitness were assessed. Covariates included total body fat, physical activity and pubertal status. Results: Adolescents with high FAS had significantly higher fitness levels than their peers of lower FAS categories except for speed-agility and handgrip in boys. Overall, the associations observed presented a medium to large effect size. Conclusion: These results suggest that socioeconomic status is positively associated with physical fitness in European adolescents independently of total body fat and habitual physical activity.financial support of the European Community Sixth RTD Framework Programme (Contract FOOD-CT-2005-007034). This analysis was also supported by grants from the Spanish Ministry of Education (AP-2005-3827, AP-2005-4358, EX-2007-1124, EX-2008-0641) This study was also supported by a Grant from the Spanish Ministry of Health:Maternal, Child Health and Development Network (number RD08/0072) (LAM) and Science-FEDER funds (Acciones Complementarias DEP2007-29933-E).Peer Reviewe

Socioeconomic status influences physical fitness in European adolescents independently of body fat and physical activity: The Helena study