Assessment of changes in spine curvatures and the sensations caused in three different types of working seats

Abstract Aims This study aimed to evaluate the changes in the spine curvatures and the sensations caused by different types of seats: standard, ischial support and salli. Methods The analyzes were performed by the kinematics and scales of discomfort and pain in 14 healthy subjects. The data collection occurred in three days, one day for each type of seat. The subjects answered questionnaires and were assessed for placement of kinematic markers used to measure the thoracic, thoraco-lumbar and lumbar angles. Each trial was conducted in a sixty-minute period on each chair. Results and conclusions The results showed that the salli seat type causes larger lumbar angles, which is consistent with the maintenance of lumbar lordosis. Likewise, the salli seat showed smaller thoraco-lumbar angle, which is consistent with smaller inferior thoracic kyphosis. Paradoxically, the ischial support seat produced less discomfort and pain than salli type. And finally, the longer the sitting position was the higher the score on the discomfort scale.

摘要
研究目的：本研究旨在评估不同类型座椅——标准型、坐骨支撑型及萨利（Salli）座椅——所引发的脊柱曲率变化与体感感受。
研究方法：本研究招募14名健康受试者，通过运动学分析及不适与疼痛量表开展相关评估。数据采集共持续三天，每日仅测试一种座椅类型。受试者需填写问卷，并接受运动学标记点安置评估，以测量胸椎、胸腰椎及腰椎角度。每种座椅的测试时长均为60分钟。
结果与结论：研究结果显示，萨利座椅可产生更大的腰椎角度，这与腰椎前凸的维持状态相符。同样，萨利座椅的胸腰椎角度更小，这与下胸椎后凸程度更低相一致。与之矛盾的是，坐骨支撑座椅带来的不适与疼痛评分低于萨利座椅。最后，坐姿持续时间越长，不适量表的得分越高。