Efeito da quantidade de horas e dia de uso do acelerômetro sobre as estimativas de atividade física em adolescentes
DOI:
https://doi.org/10.1590/1980-0037.2019v21e55973Resumo
Objetivou-se analisar o efeito da quantidade de horas e dias de uso do acelerômetro sobre as estimativas de tempo de atividade física (AF) em adolescentes. Estudo transversal com 784 adolescentes de 10 a 14 anos de idade (53,9% do sexo feminino). Os tempos médios de atividade física leve (AFL), moderada (AFM), vigorosa (AFV), moderada a vigorosa (AFMV) e as prevalências de níveis suficientes de AF entre diferentes quantidades de horas (?6, ?8 e ?10 horas/dia) e dias (?3, ?4, ?5 e 7 dias/uso) de uso do acelerômetro foram comparadas pelas interseções dos intervalos de confiança de 95% (IC95%). Os critérios de ?6 horas/dia com ?3, ?4, ?5 e 7 dias e ?8 horas/dia com ?3, ?4 e ?5 dias de uso do acelerômetro subestimaram, em média, o tempo de AFL em 23,1 e 12,6 min/dia, respectivamente, comparados a ?10 horas/dia.Não houve diferenças significativas nos tempos médios de AFM, AFV, AFMV e nas prevalências de níveis suficientes de AF entre as quantidades de horas e dias de uso analisadas. Para produzir estimativas precisas do tempo de AF em adolescentes foi necessário adotar ?3 dias de uso do acelerômetro durante ?10 horas/dia para AFL e ?6 horas/dia para AFM, AFV e AFMV.
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