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的支持。PA/Sleep组件将包括为6岁以上的调查参与者提供一个基于加速计的监测器，并要求监测器在手腕上全天候佩戴七天。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，12岁以上的参与者将被要求用每只手握力计握力，握力将被记录下来。

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.