Faculty of Medicine, Memorial University of Newfoundland, St. John's, Canada.
School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, Canada.
Ergonomics. 2022 Jul;65(7):976-986. doi: 10.1080/00140139.2021.2007290. Epub 2022 Jan 25.
A prototype chair with anterior chest and arm supports has been designed to reduce compressive spine loads. The purpose of this study was to compare the effects of this offloading design on seated height compared to a control configuration of the same chair. 20 males sat on each configuration for 1 hour. Seated height, perceived pain, spine angles, seat pressure, and participant experience were measured. Spine height loss was significantly reduced in the offloading (-0.75 ± 3.79 mm) compared to the control configuration (-6.16 ± 4.27 mm, < 0.001), and participants sat significantly more anterior on the seat pan in the offloading (20.56 ± 1.67 cm) compared to control configuration (18.03 ± 1.92 cm, < 0.001). There were no differences in spine angles or perceived back and gluteal pain between configurations. This design appears to be a promising approach to protecting the back during sitting when engaging in forward leaning tasks where the offloading effect of a backrest may be minimised. A prototype chair with anterior chest and arm supports designed to offload the spine was shown to significantly reduce seated height loss during 1-hour of sitting compared to a control configuration. While participants perceived the offloading design to be more supportive, no differences in perceived pain or posture were found.
一种带有前胸部和手臂支撑的原型椅已被设计用于减轻脊柱压缩负荷。本研究的目的是比较这种减压设计与同椅的对照结构在坐姿高度上的影响。20 名男性分别坐在每种配置上 1 小时。测量坐姿高度、感知疼痛、脊柱角度、座椅压力和参与者体验。与对照结构（-6.16±4.27mm， < 0.001）相比，减压结构（-0.75±3.79mm）的脊柱高度损失显著降低，并且参与者在减压结构中坐在座椅前缘的位置明显更深（20.56±1.67cm）与对照结构（18.03±1.92cm， < 0.001）。两种配置之间的脊柱角度或背部和臀部疼痛感知没有差异。当进行前倾任务时，这种设计似乎是一种很有前途的保护背部的方法，因为靠背的减压效果可能会降低。一种带有前胸部和手臂支撑的原型椅，旨在减轻脊柱的负荷，与对照结构相比，在 1 小时的坐姿中，显著降低了坐姿高度的损失。虽然参与者认为减压设计更具支撑力，但在感知疼痛或姿势方面没有发现差异。
