University of Puget Sound, 1500 N. Warner, 98416-0510, Tacoma, Washington.
J Occup Rehabil. 1995 Mar;5(1):17-25. doi: 10.1007/BF02117817.
The Lift Alert (™) is a small battery-operated unit, usually worn on the back of a worker's collar that is designed to provide a form of biofeedback about changes in trunk position during lifting tasks. The purpose of this study was to determine how consistent the Lift Alert (™) was at each of five different sensitivity settings (A-E) in detecting changes in trunk flexion in a given individual during a controlled bending maneuver. The subjects were videotaped while performing a series of trials of bending maneuvers at each of the sensitivity settings according to a specific protocol. The videotapes were then converted onto a computer program where the still images were captured and marked for data analysis. The reliability of the Lift Alert (™) was determined by calculating a coefficient of agreement, that is, the percentage of trials that were within both 10 and 15 degrees for each of the trials at a given setting for a single individual. The coefficient of agreement for all trials at all five settings was 0.76 within 10 degrees and 0.92 within 15 degrees. The results of this study suggest that the Lift Alert (™) is a reliable device for detecting changes in trunk flexion during a controlled bending maneuver for a given individual.
Lift Alert（™）是一种小型电池操作单元，通常佩戴在工人衣领的背面，旨在提供一种关于在举升任务中躯干位置变化的生物反馈形式。本研究的目的是确定在特定协议下，Lift Alert（™）在五个不同灵敏度设置（A-E）下检测给定个体在受控弯曲动作中躯干弯曲变化的一致性。受试者在每个灵敏度设置下进行一系列弯曲动作试验时被录像。然后将录像转换到计算机程序中，在那里可以捕获静止图像并进行数据分析。Lift Alert（™）的可靠性通过计算一致性系数来确定，即给定设置下每个试验中在 10 度和 15 度内的试验百分比。在所有五个设置的所有试验中，10 度内的一致性系数为 0.76，15 度内的一致性系数为 0.92。本研究结果表明，Lift Alert（™）是一种可靠的设备，可用于检测给定个体在受控弯曲动作中躯干弯曲的变化。
