Moriguchi Cristiane S, Sato Tatiana O, Coury Helenice J C G
Federal University of São Carlos, Physical Therapy Department, São Carlos, Brazil.
Saf Health Work. 2019 Sep;10(3):314-320. doi: 10.1016/j.shaw.2019.01.006. Epub 2019 Jan 28.
Sitting posture may be related to risk factors, including inadequate weight-bearing support, particularly when maintained for long periods. Considering that body weight is loaded in a closed support system composed of the seat, backrest, floor and working surface, the aims of the present study were to describe the development of an ergonomic sitting workstation to continuously record weight-bearing at the seat, chair, backrest, work surface, and floor and to test its measurement properties: reproducibility, criterion-related validity, and sensitivity.
Rigid bodies (1 to 30 kg) and participant weights were recorded to evaluate the workstation measurement properties.
Rigid body tests showed variation values less than 0.050 kg on reproducibility test and errors below 5% of measured value on criterion validity tests. Participant tests showed no statistically significant differences between repeated measures (p ≥ 0.40), errors were less than 2% of participant weights and sensitivity presented statistically significant changes (p = 0.007).
The sitting workstation proposed showed to be reliable, valid and sensitive for use in future ergonomic studies to evaluate the sitting posture.
坐姿可能与危险因素有关，包括承重支撑不足，尤其是长时间保持该姿势时。鉴于体重加载于由座椅、靠背、地板和工作面组成的封闭支撑系统中，本研究的目的是描述一种符合人体工程学的坐姿工作站的开发情况，该工作站可连续记录座椅、椅子、靠背、工作面和地板上的承重，并测试其测量特性：可重复性、与标准相关的效度和敏感性。
记录刚体（1至30千克）和参与者的体重，以评估工作站的测量特性。
刚体测试显示，重复性测试的变化值小于0.050千克，标准效度测试的误差低于测量值的5%。参与者测试显示，重复测量之间无统计学显著差异（p≥0.40），误差小于参与者体重的2%，且敏感性呈现出统计学显著变化（p = 0.007）。
所提出的坐姿工作站在未来用于评估坐姿的人体工程学研究中显示出可靠、有效且敏感。
