RESUMO
La literatura científica ha demostrado a través de diversos métodos (cuestionarios y acelerómetros, principalmente) que las clases de educación física (EF) influyen positivamente en el logro de las recomendaciones de actividad física (AF) en la población escolar. Sin embargo, el uso de nuevas tecnologías como los teléfonos móviles o smartphone, parecen ser una interesante herramienta de bajo costo que también podrían ayudar a determinar el nivel de AF. Por tanto, el objetivo del presente estudio fue describir como influye la clase de EF en el número de pasos diarios en escolares que utilizaron una aplicación móvil RuntasticPedometer para monitorear dicha variable. La muestra estuvo compuesta por 50 estudiantes (edad media de 14.1 +/-1.6 años) pertenecientes al Instituto de Educación Secundaria Melchor de Macanaz de la localidad de Hellín (Albacete, España). Tras analizar los datos, se observaron diferencias significativas (p<0.05) durante los días en que los escolares realizaron la clase de EF y los que no (9.950 vs. 8.023 pasos/día,respectivamente). Además, la variación entre los días con y sin EF también fueron estadísticamente diferentes entre niños y niñas (2.644 vs. 1.579 pasos/día, respetivamente).Finalmente, se podría concluir que las clases de EF parecen influir positivamente en el aumento del número de pasos en escolares, lo que elevaría las posibilidades de que estos niños y niñas logren los parámetros mínimos de AF recomendada por las diversas organizaciones de salud. Por otro lado, cabe señalar que el uso de nuevas tecnologías de uso masivo como los smartphone, podrían ser una interesante herramienta a validar orientadas al monitoreo de la AF.
The scientific literature has demonstrated through various methods (questionnaires and accelerometers, mainly), the classes of physical education (PE) positively influence the achievement of the recommendations of physical activity (PA) in the school population. However, the use of new technologies such as mobile phones or smartphone, appear to be an interesting inexpensive tool that could also help determine the level of AF. Therefore, the objective of this study was to describe as PE class influences in the daily number of steps in school who used a mobile application "Runtastic Pedometer" to monitor the variable. The sample consisted of 50 students (mean age 14.1 +/- 1.6 years) belonging to the Institute of Secondary Education "MelchorMacanaz" from the Hellín (Albacete, Spain). After analyzing the data, significant differences (p <0.05) were observed during the days when the school made PE class and those without (8,023 vs. 9,950 steps / day, respectively). Moreover, the variations between days with and without EF were also statistically different between boys and girls (2,644 vs. 1,579 steps/day,respectively). Finally, one could conclude that PE classes seem positively influence the increase in the number of steps in school raising the chances that these children achieve the minimum standards recommended HF various health organizations. On the other hand, it notes that the use of new technologies in widespread use as the smartphone could be an interesting tool to validate oriented monitoring AF.
Assuntos
Humanos , Masculino , Adolescente , Feminino , Atividade Motora/fisiologia , Aplicativos Móveis , Educação Física e Treinamento , Caminhada/fisiologiaRESUMO
The aim of this study was to investigate the effects of astaxanthin-enriched diet on blood pressure, cardiac hypertrophy, both vascular structure and function and superoxide ((*)O(2-)) production in spontaneously hypertensive rats (SHR). Twelve-week-old SHR were treated for 8 weeks with an astaxanthin-enriched diet (75 or 200mg/kg body weight per day). Systolic blood pressure was monitorized periodically during the study by the tail cuff method. At the end of the study animals were sacrificed and heart, kidneys and aorta were removed. Left ventricular weight/body weight ratio was used as left ventricular hypertrophy index (LVH). Vascular function and structure were studied in conductance (aortic rings) and resistance (renal vascular bed) arteries. Also (*)O(2-) production was evaluated by lucigenin-enhanced chemiluminescence. Systolic blood pressure was lower in astaxanthin-treated groups than the control group from the first week of treatment, and LVH was significantly reduced. Astaxanthin improved endothelial function on resistance arteries, but had no effect on aorta. These effects were accompanied by a decrease in oxidative stress and improvements in NO bioavailability. Taken together, these results show that diet supplemented with astaxanthin has beneficial effects on hypertension, by decreasing blood pressure values, improving cardiovascular remodeling and oxidative stress.