How many daily steps are really enough for adolescents? A cross-validation study

  1. Maribel Parra Saldías 1
  2. Daniel Mayorga-Vega 2
  3. Iván López-Fernández 3
  4. Jesús Viciana 2
  1. 1 Universidad de Los Lagos, Chile
  2. 2 Universidad de Granada, España
  3. 3 Universidad de Málaga, España
Revista:
Retos: nuevas tendencias en educación física, deporte y recreación

ISSN: 1579-1726 1988-2041

Año de publicación: 2018

Número: 33

Páginas: 241-246

Tipo: Artículo

Otras publicaciones en: Retos: nuevas tendencias en educación física, deporte y recreación

Resumen

El propósito principal del presente estudio fue comparar la precisión de los umbrales de pasos diarios totales asociados a la recomendación de 60 minutos por día de actividad física moderada-vigorosa en adolescentes. Un total de 156 adolescentes, 87 varones y 69 mujeres, participaron en el presente estudio. La actividad física moderada-vigorosa y pasos se evaluaron objetivamente con acelerómetros GT3X durante ocho días consecutivos. Se calculó la precisión de los siguientes umbrales de pasos diarios totales (varones/mujeres): 9.930, 11.714, 12.000, 11.000/10.500, 14.000/11.500, 13.000/12.000, 8.500/7.500, 11.500/9.000, 10.500/9.500, 12.118, 12.118/12.605 y 10.000. Los resultados de precisión para los puntos de corte de los pasos diarios ajustados y no ajustados variaron de bajo a alto. Para los pasos diarios no ajustados, los puntos de corte 11.000 para los varones y 10.500 para las mujeres mostraron los mejores resultados: Sensibilidad= 0,85; Especificidad= 0,94; Índice de Youden= 0,78; Proporción de acuerdo= 0,93, y coeficiente de Kappa= 0,67, p < 0,001. Para los pasos diarios ajustados, el puntaje de corte de 10.000 mostró los mejores resultados: Sensibilidad= 0,77; Especificidad= 0,95; Índice de Youden= 0,72; Proporción de acuerdo= 0,93, y coeficiente de Kappa= 0,65, p < 0,001. Entre los adolescentes para los pasos diarios totales medidos con acelerometría se deberían utilizar los puntos de corte 11.000 para los varones y 10.500 para las mujeres. Para las recomendaciones a nivel poblacional sobre los pasos relacionados con la salud en los adolescentes, el punto de corte de 10.000 pasos diarios parece ser el más apropiado.

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