Características do ambiente percebido e tempo de prática de atividade física de diferentes intensidades em adolescentes: Uma análise longitudinal

Abstract

The objective of the present study was to longitudinally analyze the relationship between the characteristics of the perceived environment and the time physical activity pratice at different intensities (light, moderate, vigorous and moderatevigorous) in adolescents from João Pessoa, Paraíba. Longitudinal observational study, with four years duration, from 2014 to 2017, with one data collection per year. The population consisted of adolescents between 10 and 13 years of age, of both sexes, from public schools in João Pessoa, Paraíba. The characteristics of the perceived environment were measured by a scale composed of 16 items, distributed in three domains: 1) places for the practice of physical activity; 2) traffic safety; 3) urban security. The time physical activity pratice was measured using Actigraph wGT3X+ accelerometers. Most adolescents (n=120) were female (55.0%), mean age 11.6 ± 0.6 years, in 2014. There was a linear trend towards a reduction in the mean practice time for all intensities and an increase in all perceived environment scores over the years of study. To associate the characteristics of the perceived environment with the different intensities of physical activity longitudinally, generalized estimating equations (GEE) were used. No significant associations were identified between the perceived environment scores and the mean time of physical activity practice at any of the investigated intensities. The presence of places to practice physical activity and urban and traffic safety did not influence the time of physical activity practice by adolescents.