Tempo de tela, tempo de sono e atividade física relacionados aos marcadores de aptidão física em crianças e adolescentes.

Abstract

Introduction: The increase of the screen time and the inadequate sleep duration have been associated with the reduction of physical activity in children and adolescents, leading to decrease of physical fitness. However, there is little evidence on the interaction of these. Hence, the aim was to analyze the relationship between screen time, sleep duration, and physical activity with the physical fitness markers. Methods: Cross-sectional study with 3081 schoolchildren between 6 and 17 years old, residents of a city in southern Brazil. Demographic variables, screen time, sleep duration, physical activity and physical fitness were assessed via questionnaire and the PROESP-Br tests. Associations were analyzed by multiple linear regression adjusted for sex, age, skin color and school zone(p< 0,01) and speed (β = 0,076; p < 0,01), and negatively associated with muscular endurance, power and flexibility. Screen time showed no significant association with any fitness markers in this group. Conclusion: In childrens, higher screen time and insufficient sleep were associated with poorer performance in agility and speed. In adolescents, regular physical activity emerged as the primary factor linked to better outcomes in physical fitness. The implementation of integrated programs that promote limiting screen use, ensuring adequate sleep and encouraging physical activity is recommended.