1. Investigación

The purpose of this study was to examine differences in sports participation and the levels of physical activity (PA) and sedentary behaviour (SB) between schoolchildren with cystic fibrosis (CF) and a healthy control group (CG) taking into account the gender variable. PA and SB were measured with an accelerometer for 7 consecutive days in 44 children (24 girls; 11.0 (3.2) years) with CF and 45 age-, sex-, and socioeconomic status-matched controls (24 girls; 11.1 (3.0) years). CF patients and CG did not differ in moderate-to-vigorous PA (54 (31) vs. 59 (27) min/day respectively) or in SB (558 (106) vs. 553 (92) min/day respectively). There were no differences in meeting the PA guidelines between both groups (CF: 36.4% vs. CG: 42.4%). Gender analysis revealed that boys were more active and met more PA guidelines than girls regardless of the group (CF or CG), girls with CF being the least active group (only 16.7% met PA guidelines). A possible compensatory effect was found between SB and PA only in the CF sample, as for each minute/day spent in SB the odds of meeting PA guidelines decreased by 34%. These findings suggest that promoting a reduction in SB is as important as promoting PA in the CF population, especially in girls. Health caregivers, coaches, teachers, or parents could offer appealing supervised and unsupervised physical activities, foster the adoption of active lifestyles, or incorporate PA into daily routines to improve the health of CF schoolchildren.

El uso de los videojuegos entre los jóvenes ha generado una gran preocupación por sus posibles efectos negativos para su salud, socialización y rendimiento académico. Respecto a este último aspecto, existen estudios que apuntan a que los videojuegos son negativos para el rendimiento académico mientras que en otras investigaciones se encuentran efectos positivos. Por esto, el presente trabajo se ocupa de las relaciones entre el tiempo de uso de videojuegos y el rendimiento académico de los escolares adolescentes de la Comunidad Valenciana. Se utilizó un cuestionario ad hoc, validado a través de juicio de expertos (0,8 validez y confiabilidad) para realizar este estudio transversal ex post facto. Se diseñó una muestra representativa estratificada y proporcional a la población de alumnado de ESO de dicha comunidad autónoma y se recogieron 1.502 cuestionarios. Los adolescentes dedican una media de 47,23 minutos al día a jugar a videojuegos, menos entre semana que en fin de semana. Aquellos que dedican más tiempo a los videojuegos entre semana suspenden más asignaturas y los que dedican más tiempo los fines de semana sacan mejores notas escolares. Además, los jugadores frecuentes, moderados y muchos de los ocasionales obtienen buenos resultados académicos, mientras que les ocurre lo contrario a los jugadores intensivos. Muchos de los jugadores ocasionales obtienen buen rendimiento, por lo que la dedicación de un tiempo moderado a los videojuegos no parece afectar al rendimiento académico. / Video game usage among young people has generated great concern due to its possible negative effects on their health, socialization and academic performance. Regarding this last aspect, there are studies that point out that video games have negative consequences for academic performance while others emphasize their positive effects. Therefore, the present study deals with the relationship between the video game usage time and the academic performance in adolescent schoolchildren from the Valencian Autonomous Community. An ad hoc questionnaire was used and validated through expert judgment (0.8 validity and reliability) to develop this cross-sectional and ex post facto study. A stratified and proportional representative sample was designed for the ESO student population of this autonomous community and 1,502 questionnaires were collected. Adolescents spend an average of 47.23 minutes a day playing video games, with less time spent during the week than at the weekend. Those who devote more time to videogames during the week fail more subjects and those who spend more time on weekends get better school grades. In addition, frequent, moderate and many of the occasional players obtain good academic results, while the opposite happens to the intensive players. As many of the occasional players achieve good academic performance, a moderate time devoted to video games seems not to affect academic performance.