COMUNICACIONES

SYMPOSIUM EXERNET. Investigación en Ejercicio y Salud: Presente y Futuro en España.
Granada, 7-8 de Noviembre de 2014

Body composition and muscular fitness in overweight and obese adolescents: EVASYON Study

P. De Miguel-Etayo^a,b,c,d, J. Santabárbara^e,f, L.A. Moreno^a,b, M. Martín-Matillas^f,g, A. Marti del Moral^h,i, C. Campoy^j,k, A. Marcos^l, J.M. Garagorri^a,c and en nombre de EVASYON Study Group

^aGENUD (Growth, Exercise, NUtrition and Development) Research Group. Universidad de Zaragoza. España
^bDepartamento de Fisiatría y Enfermería. Facultad de Ciencias de la Salud. Universidad de Zaragoza. España
^cDepartamento de Pediatría, Radiología y Medicina Física. Facultad de Medicina, Universidad de Zaragoza. España
^dDepartamento de Medicina Preventiva y Salud Pública. Facultad de Ciencias de la Salud y del Deporte. Universidad de Zaragoza. España
^eCentro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Ministerio de Ciencia e Innovación. Madrid
^fDepartamento de Educación física y Deportiva. Facultad de Ciencias del Deporte. Universidad de Granada. España
^gPROFITH (PROmoting FITness and Health through physical activity) Research Group
^hUnidad de Endocrinología pediatríaca. Departamento de Pediatría. Clínica Universidad de Navarra
ⁱDepartamento de Ciencias de la Alimentación, Nutrición y Fisología. Universidad de Navarra
^jDepartamento de Pediatría. Facultad de Medicina, Universidad de Granada. España
^kEURISTIKOS Excellence Centre for Paediatric Research. Biomedical Research Centre. Parque Tecnológico de Ciencias de la Salid. Universidad de Granada. España
^lImmunonutrition Research Group, Departamento de Metabolismo y Nutrición, Instituto de Ciencia y Tecnología de Alimentos y Nutrición. Consejo Superior de Investigaciones Científicas. Madrid, España
Correo electrónico: pilardm@unizar.es (P. De Miguel-Etayo).

Body composition. Multi-intervention approach. Dual X-ray absorptiometry. Fat mass loss programme. Muscular fitness. Handgrip strength.

Aim. Physical fitness has been considered a powerful marker of health, in childhood and in adulthood, independent of physical activity. A low fitness status during childhood and adolescence is associated with important health-related outcomes, such as increased future risk for obesity and cardiovascular diseases, impaired skeletal health. Moreover, the main objectives of weight loss interventions in children and adolescents are to decrease fat mass while maintaining fat-free mass. The aim was to assess the relation between body-fat changes and strength performance in obese adolescents after 13 months in a multidisciplinary intervention.
Methods. Multi-intervention approach (diet, physical activity and psychological support in a family-group-based treatment) was implemented with a one-year intervention in 13-to-16-year-old overweight or obese Spanish adolescents. A total of 78 adolescents were recruited from Granada and Zaragoza, males (n = 42) (31.98 kg/m²) and females (n = 36) (32.24 kg/m²). We measured body composition with dual-energy X-ray absorptiometry and muscular fitness was assessed by standing broad jump and handgrip strength. All measurements were made at baseline and 13 months. Non-parametric Spearman's rho partial correlation coefficients were applied to assess the associations between body-fat and strength performance based on anthropometric measurements at the end of the EVASYON treatment programme (13 months), controlling for potential confounders (age and Tanner stage).
Results. After controlling for age and Tanner stage, the body-fat during the EVASYON programme was significantly correlated with handgrip strength changes in females (rho = -0.438, p = 0.022). Moreover, in males body-fat changes was correlated with standing broad jump changes (rho = -0.407, p = 0.058).
Conclusions. We found handgrip strength would be a good predictor of body-fat composition changes in females and standing broad jump in males. However, more researches are needed to find the best physical fitness predictor to body composition changes.