Moraes Augusto César Ferreira de, Fernandes Carlos Alexandre Molena, Elias Rui Gonçalves Marques, Nakashima Alika Terumi Arasaki, Reichert Felipe Fossati, Falcão Mário Cícero
Programa de pós-graduação em Ciências, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP.
Rev Assoc Med Bras (1992). 2009 Sep-Oct;55(5):523-8. doi: 10.1590/s0104-42302009000500013.
To estimate the prevalence of physical inactivity among adolescents (14-18 years) in the city of Maringá/PR and to explore its association with demographic, socioeconomic and behavioral, indicators of nutritional status variables.
Cross-sectional study with a representative sample of 991 adolescents (54.5% girls) from both public and private high schools selected through multi stage random sampling. The level of habitual physical activity was verified through the IPAQ modified for adolescents, using the last week as a reference period. Physical inactivity was defined as <300 min/wk of moderate and vigorous physical activity. The independent variables studied were: gender, age, type of high school, socioeconomic level, smoking, sedentary behavior (> 4 h/d), nutritional status and abdominal obesity.
Prevalence of physical inactivity among adolescents was 56.9% (girls = 57.9%, boys = 55.7%, p =. 046). The risk factors associated with physical inactivity were belonging to the lower socioeconomic level, studying at public schools and being obese.
We found a high prevalence of physical inactivity in the study. It is urgently necessary to develop strategies aimed at increasing physical activity, which can be achieved by development of an educational content that promotes healthy life styles.
评估马林加市/巴拉那州14至18岁青少年身体活动不足的患病率，并探讨其与人口统计学、社会经济和行为、营养状况变量指标之间的关联。
采用横断面研究，通过多阶段随机抽样从公立和私立高中选取991名青少年（54.5%为女孩）作为代表性样本。以过去一周为参考期，通过针对青少年修改后的国际体力活动问卷（IPAQ）来核实习惯性身体活动水平。身体活动不足定义为每周中等强度和剧烈身体活动时间<300分钟。所研究的自变量包括：性别、年龄、高中类型、社会经济水平、吸烟情况、久坐行为（>4小时/天）、营养状况和腹型肥胖。
青少年身体活动不足的患病率为56.9%（女孩=57.9%，男孩=55.7%，p = 0.046）。与身体活动不足相关的危险因素包括社会经济水平较低、就读于公立学校和肥胖。
我们在研究中发现身体活动不足的患病率很高。迫切需要制定旨在增加身体活动的策略，这可以通过开发促进健康生活方式的教育内容来实现。
