Variação sazonal das atividades físicas e sedentárias de estudantes no semiárido baiano

Abstract

This one-year follow-up study analyzed the seasonal variation of physical activities and sedentary behaviors among children and adolescents, from public schools in the semiarid region of Bahia state (convenience sample, n = 462; 52.9% boys; 7-12 years). Physical activities and sedentary behaviors were reported in the Food Intake and Physical Activity of School Children Questionnaire (WEB-CAAFE). Seasonal measurements were performed in fall, winter and spring. The outcomes were: daily amount of physical activities (DPA) and sedentary behaviors (SB), frequencies of light (LPA), moderate (MPA) and vigorous (VPA) physical activities. The analyses were conducted via modeling of generalized estimation equations (GEE), with adjustment by temperature and rainfall. There was no statistically significant seasonal variation in DPA. During winter, there were more reports of LPA (Coef² = 1.37; 95%CI: 1.14-1.66) and SB (Coef² = 1.16; 95%CI: 1.05-1.29), while VPA was less frequent (Coef² = 0.83; 95%CI: 0.71-0.97). VPA occurred less in the fall (Coef² = 0.82; 95%CI: 0.69-0.98). Sex modified the effect of seasons on VPA: among boys, VPA occurred more frequently in the fall (Coef² = 1.72; 95%CI: 1.16-2.56) and winter (Coef² = 1.84; 95%CI: 1.26-2.69). Age modified the effect of the seasons on the SB: there were more SB in the 10-12 years age group, however, with a statistically significant difference only in the fall and early spring. LPA and SB increased during winter, but VPA decreased, especially among girls. Students aged 10-12 years had more SB in the fall and early spring.