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Objective: To compare the moderate-to-vigorous physical activity of physical education classes taught by teachers and their students during recess. Method: In order to determine the physical activity intensity the system for observing fitness instruction time (SOFIT) was used, a descriptive cross-sectional comparative methodological design was used, 63 physical education classes were evaluated selecting randomly four students from each class (2 men and 2 women), the same procedure was followed to evaluate the same 4 students during the 30 minutes of recess. Results: The equality of variance was calculated using the Student t test for independent samples resulting a P-value=.001 α≤ less than 0.05, with a percentage time of moderate-to-vigorous physical activity in physical education classes taught by teachers of 41%±17.7 and performed by students during recess of 50%±10.3, the percentage of difference (Δ%) was of 18% between the variables. Conclusion: The intensity of physical activity during recess was higher without teacher instruction in relation to physical education classes evaluated, due is important a feedback for the teachers in strategies for involving the students in moderate to vigorous physical activity as established by the World Health Organization.  Resumen. Objetivo: Comparar la actividad fisica moderada a vigorosa de clases de educacion fisica impartidas por profesores y la intensidad de la actividad fisica de sus estudiantes durante el recreo. Metodo: Se utilizo como instrumento de evaluacion el sistema para observar el tiempo de instruccion de actividad fisica (SOFIT), el diseno metodologico fue transversal descriptivo comparativo, evaluando 63 clases de educacion fisica seleccionado al azar cuatro estudiantes de cada clase (2 hombres y 2 mujeres), el mismo procedimiento se siguio, evaluando a los mismos 4 estudiantes durante los 30 minutos del recreo. Resultados: La igualdad de la varianza se calculo mediante la prueba t Student para muestras independientes resultando una P-Valor=.001 menor a α≤ 0.05, el porcentaje de tiempo de actividad fisica moderada a vigorosa en las clases de educacion fisica impartidas por profesores fue de 41%±17.7 y la realizada por los estudiantes durante el recreo resulto en 50%±10.3 y un porcentaje de diferencia (Δ%) de 18%. Conclusion: La intensidad de actividad fisica durante el recreo fue mayor sin instruccion docente en relacion a las clases de educacion fisica evaluadas, por lo anterior es importante retroalimentar de manera constructiva la manera de impartir la clase de los profesores mediante capacitacion con estrategias didacticas para involucrar al alumno en actividad fisica moderada a vigorosa como lo establece la Organizacion Mundial de la Salud.

retos

Moderate-to-vigorous physical activity during recess and physical education among mexican elementary school students (Actividad física moderada a vigorosa durante el recreo y clase de educación física en niños mexicanos de escuela primaria)