Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/48277
Título: Influence of extracurricular sport activities on body composition and physical fitness in boys: A 3-year longitudinal study
Autores/as: Ara, I.
Vicente-Rodriguez, G.
Perez-Gomez, J.
Jimenez-Ramirez, J.
Serrano-Sanchez, J. A. 
Dorado, C. 
Calbet, J. A. L. 
Palabras clave: X-Ray Absorptiometry
Bone-Mineral Density
Energy-Expenditure
Mass Index
Fat Distribution, et al.
Fecha de publicación: 2006
Editor/a: 0307-0565
Publicación seriada: International Journal of Obesity 
Resumen: Objective: To analyse the effect of extracurricular physical activities on fat mass accumulation and physical fitness during growth in early pubertal males.Design: Longitudinal study.Subjects: A total of 42 male children (9.4 +/- 1.4 years, Tanner I-II and 12.7 +/- 1.5 years, Tanner III-IV, before and after the 3.3 years follow-up, respectively), randomly sampled from the population of Gran Canaria (Spain), 26 of them physically active (PA, at least 3 h per week during 3 years) and 16 non-physically active (non-PA).Measurements: Body composition (dual-energy X-ray absorptiometry), anthropometrics (body circumferences and skinfolds) and physical fitness variables (dynamic and isometric force, anaerobic capacity and maximal aerobic power) were determined in all subjects.Results: Both groups had comparable body sizes at the start and the end of the study. Body mass index increased with growth more in the PA than in the non-PA group (P < 0.05). However, fat mass accumulation with growth was lower in the PA than in the non-PA (P < 0.05). There was a positive relationship between the increment of total and trunkal fat mass, especially in non-active children (r(2)=0.93). In contrast, there was an inverse relationship between the total lean mass growth and the accumulation of total and regional fat mass (r=-0.37 to -0.41, all P < 0.05). Physical fitness was maintained in the PA, while it worsened in the non-PA children.Conclusions: Without any dietary intervention, children who regularly participate in at least 3 h per week of sports activities are more protected against total and regional fat mass accumulation. They also increase their total lean and bone mass to a greater extent than children who do not participate in extracurricular sport activities. In addition, PA children maintain their physical fitness during growth, while it deteriorates in the non-PA children.
URI: http://hdl.handle.net/10553/48277
ISSN: 0307-0565
DOI: 10.1038/sj.ijo.0803303
Fuente: International Journal Of Obesity[ISSN 0307-0565],v. 30 (7), p. 1062-1071
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