Adolescent / Spain / Adipose tissue / Overweight / Humans / Child / Exercise and physical activity for health / Female / Male / Body Mass Index / ROC Curve / Fat Mass / Body mass index (BMI) / Sensitivity / Reproducibility of Results / Indexation / Sensitivity and Specificity / Medicina Clinica / Child / Exercise and physical activity for health / Female / Male / Body Mass Index / ROC Curve / Fat Mass / Body mass index (BMI) / Sensitivity / Reproducibility of Results / Indexation / Sensitivity and Specificity / Medicina Clinica