National Research Centre for the Working Environment, Copenhagen, Denmark.
Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark.
Ergonomics. 2020 May;63(5):607-617. doi: 10.1080/00140139.2020.1734668. Epub 2020 Mar 5.
Occupational kneeling and squatting are well-documented risk factors for knee disorders. A method using 3 wireless accelerometers to detect and discriminate kneeling and squatting during work were developed based on data from a semi-standardised laboratory protocol. The method was tested for validity under free-living working conditions. The developed method showed high sensitivity (88-99%) and specificity (98-99%) for detection of kneeling and squatting during the semi-standardised laboratory conditions. During free-living working conditions, kneeling showed very high sensitivity (94%) and specificity (99%), while squatting results were non-conclusive due to limited duration of squatting during the free-living working conditions. This method shows great promise for long-term technical measurement of kneeling and squatting during normal working conditions using wireless accelerometers. The method opens up possibilities for using technical measurements to provide valid exposure assessments and intervention evaluations of kneeling and squatting, as well as increased feasibility for technical measurements in large cohort studies. Quantification of kneeling and squatting during work is important for prevention, but limited by either imprecise or costly methods. This study developed and validated an inexpensive wireless accelerometer-based measurement method that can be used by practitioners and researchers for long-term measurements of kneeling and squatting during free-living working conditions.
职业性跪姿和蹲姿是膝关节疾病的明确危险因素。本研究基于半标准化实验室方案中的数据，开发了一种使用 3 个无线加速度计来检测和区分工作中跪姿和蹲姿的方法。该方法在自由工作条件下进行了有效性测试。在半标准化实验室条件下，该方法对跪姿和蹲姿的检测具有很高的灵敏度（88-99%）和特异性（98-99%）。在自由工作条件下，跪姿的检测结果具有很高的灵敏度（94%）和特异性（99%），而蹲姿的检测结果由于自由工作条件下蹲姿持续时间有限，因此无法得出明确的结论。该方法为使用无线加速度计在正常工作条件下长期监测跪姿和蹲姿提供了巨大的潜力。该方法为使用技术测量来提供有效的暴露评估和干预评估提供了可能性，也为在大型队列研究中进行技术测量提供了更高的可行性。在工作中定量评估跪姿和蹲姿非常重要，但受到不准确或昂贵方法的限制。本研究开发并验证了一种经济实惠的基于无线加速度计的测量方法，供从业者和研究人员在自由工作条件下长期监测跪姿和蹲姿使用。
