National Health and Nutrition Examination Survey 2011-2012 and 2013-2014 Physical

为NHANES中的体力活动（PA）/睡眠和力量组件提供额外支持。PA/睡眠组件将涉及提供基于加速度计的监视器，以调查6岁以上的参与者，并要求将监视器全天候佩戴在手腕上七天。该设备将收集运动数据，以提供有关PA以及睡眠持续时间和效率的信息。对于力量部分，年龄在12岁以上的受试者B将用每只手挤压一个握力测力计，并记录挤压的力量。

To provide additional support for the Physical Activity (PA)/Sleep and Strength components in NHANES. The PA/Sleep component will involve providing an accelerometer-based monitor to survey participants ages 6+ years and request that the monitor be worn around the clock on the wrist for seven days. The device will collect movement data to provide information about PA as well as the duration and efficiency of sleep. For the Strength component, participants ages 12+ years wil b easekd to squeeze a hand-grip dynamometer with each hand and the strength of the squeeze will be recorded.