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Original articles  BODY COMPOSITION, SPORT NUTRITION AND SUPPLEMENTATION (ergogenics) 

The Journal of Sports Medicine and Physical Fitness 2006 March;46(1):79-83

Copyright © 2006 EDIZIONI MINERVA MEDICA

lingua: Inglese

Relationship between physical activity and obesity in children and adolescents

Guerra S. 1, Teixeira-Pinto A. 2, Ribeiro J. C. 1, Ascensão A. 1, Magalhães J. 1, Andersen L. B. 3, Duarte J. A. 1, Mota J. 1

1 Faculty of Sports Science and Physical Education University of Porto, Porto, Portugal 2 Faculty of Medicine, University of Porto, Porto, Portugal 3 Institute for Exercise and Sport Sciences University of Copenhagen, Copenhagen, Denmark


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Aim. The purpose of the present study was to analyze the relationship between physical activity (PA) and obesity in Portuguese children and adolescents.
Methods. The sample consisted of 1 341 children and adolescents (8-15 years of age), 634 males (age, 10.6±2.3 y; body mass, 40.6±12.7 kg; height, 1.431±1.41 m) and 707 females (age, 10.9±2.4 y; body mass, 50±12.4 kg; height, 1.428±1.32 m). The sample was divided into quartiles of percentage of body fat (%BF) and physical activity index (PAI), within age and gender. Children in the upper %BF quartile were defined as obese (arbitrary definition). Logistic regression for each PAI quartile was used to determine the odds ratio of obese children and adolescents (≥P75 of %BF) in comparison to their non-obese counterparts (Results. Males in the lowest PAI quartile have an odds ratio of 2.1 of having obesity in relation to males in the highest PAI quartile. For females any significant result was found between PAI quartiles.
Conclusion. The results obtained in this study add some data to the controversy of PA and obesity relationship youth. Logistical regression shows that males who have a lower PAI have an odds ratio of 2.1 of obesity, in comparison with males that have higher PAI. Those findings were not found in girls.

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