Objective To investigate the relation of sleep duration and physical activity (PA) level to obesity.

目的：通过大样本横断面研究，初步探讨睡眠时间、身体活动水平和肥胖的关系。

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Objective To investigate the relation of sleep duration and physical activity (PA) level to obesity.

目的：通过大样本横断面研究，初步探讨睡眠时间、身体活动水平和肥胖的关系。

youdao