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Objetivo: determinar los valores percentílicos de la condición física saludable en escolares colombianos entre 12 y 18 años. Materiales y métodos: estudio cuantitativo de tipo descriptivo observacional transversal. La muestra estuvo constituida por 3458 escolares de colegios públicos y privados con edades comprendidas entre 12 y 18 años seleccionados mediante muestreo aleatorio simple. Para la recolección de información se utilizó la batería Alpha fitness versión extendida. El análisis estadístico se realizó en el software SPSS versión 24. Resultados: se establecen valores normativos por edad y sexo, expresados en percentiles P3, P10, P25, P50, P75, P90 y P97. La media del IMC en los hombres fue de 21,0 ± 3,2 Kg/cm2 siendo inferior que el de las mujeres. El perímetro de cintura (cms) y la media del test de velocidad (segundos) fueron superiores en mujeres, mientras que el porcentaje graso (%), la capacidad aeróbica (mts), la media de la prensión manual de la mano (kg) y la media de salto longitudinal (cms) fue superior en los hombres; se encontraron diferencias estadísticamente significativas p<0,05 por edad y sexo en la mayoría de los componentes de la condición física saludable Conclusiones: con este estudio se plantean valores percentílicos de referencia para la condición física saludable por edad y sexo para escolares colombianos, lo que deja a los participantes en el estudio en zonas saludable o de riesgo de salud, lo cual se convierte en una herramienta adaptada al contexto latinoamericano, útil para la diagnóstico de los componentes de la condición física y su relación con elementos de salud y educativos.  Abstract. Objective: to determine the percentile values ​​of healthy physical condition in Colombian schoolchildren between 12 and 18 years old. Materials and methods: cross-sectional observational descriptive quantitative study. The sample consisted of 3458 schoolchildren from public and private schools aged between 12 and 18 years selected by simple random sampling. The Alpha fitness extended version battery was used to collect information. Statistical analysis was performed in SPSS version 24 software. Results: normative values ​​for age and sex are established, expressed in percentiles P3, P10, P25, P50, P75, P90 and P97. The mean BMI in men was 21.0 ± 3.2 Kg / cm2, being lower than that of women. The waist circumference and the mean of the speed test were higher in women, while the fat percentage, the aerobic capacity, the mean of the manual grasp of the hand and the mean of the longitudinal jump were higher in the men; Statistically significant differences were found p <0.05 for age and sex in most of the components of healthy physical condition. Conclusions: with this study, percentile reference values ​​for healthy physical condition by age and sex for Colombian schoolchildren are proposed, which which becomes a tool adapted to the Latin American context, useful for the diagnosis of the components of physical condition and their relationship with health and educational elements.

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Objective: to validate and adapt the Sedentary Behavior Questionnaire. Materials and methods: content adaptation and validation study, the Delphi technique was used, 18 experts evaluated the items of the questionnaire on a Likert scale regarding their relevance, utility, clarity, written form and length. Results: the questionnaire through its items assesses sedentary activity, the qualitative evaluation showed the need to adapt some questions regarding semantic to the Colombian context, the only item with an alpha lower than 0.70 was 7, the item with the highest Cronbach alpha was 10, the general Cronbach alpha of the instrument was 0.963, which is considered to be of optimal reliability. Conclusions: The content validation process showed that the Sedentary Behavior Questionnaire is a valid instrument in its content that is easy to apply and fill out, it allows a first approach to the sedentary behaviors of the subjects that can be complemented with physical tests to define the level of sedentary lifestyle, the foregoing enables the structuring of promotion and prevention programs by applying an instrument adapted and validated to the Colombian context.