Objectives. The chair is a standard piece of workstation equipment in an office. Previous studies showed that a suitable chair may reduce musculoskeletal symptoms. This review investigated the effect of chair intervention on lower back pain (LBP), discomfort and trunk muscle activation among office workers. Methods. Five electronic databases from 1980 to May 2020 were searched for relevant randomized and non-randomized controlled trials. The methodological quality of the included studies was assessed using the 13-item Cochrane risk of bias tool. Quality of evidence was assessed and rated according to Grading of Recommendations, Assessment, Development and Evaluations (GRADE) guidelines. Results. Two randomized controlled trials, 10 repeated-measures studies and two prospective cohort studies were included in this review. Nine studies were rated as high quality. The results indicated very low-quality to low-quality evidence for the conflicting effect of chair intervention on pain and discomfort reduction as well as trunk muscle activation among office workers. When stratified by chair type, the level of evidence for health benefits derived from any type of chair was still of very low to low quality. Conclusion. Unless supplementary high-quality studies provide different evidence, chair interventions are not recommended to reduce LBP or discomfort and activate trunk muscles.

目标。椅子是办公室中的标准工作站设备。先前的研究表明，合适的椅子可以减轻肌肉骨骼症状。本综述调查了椅子干预对办公室工作人员腰痛 (LBP)、不适和躯干肌肉激活的影响。方法。检索了 1980 年至 2020 年 5 月的五个电子数据库，以获取相关的随机和非随机对照试验。使用 13 项 Cochrane 偏倚风险工具评估纳入研究的方法学质量。根据建议分级、评估、开发和评估 (GRADE) 指南对证据质量进行评估和评级。结果. 本综述纳入了两项随机对照试验、10项重复测量研究和两项前瞻性队列研究。九项研究被评为高质量。结果表明，椅子干预对减轻办公室工作人员的疼痛和不适以及躯干肌肉激活的相互矛盾影响的证据质量非常低到低质量。当按椅子类型分层时，任何类型椅子带来的健康益处的证据水平仍然非常低到低质量。结论。除非补充的高质量研究提供不同的证据，否则不建议使用椅子干预来减少 LBP 或不适并激活躯干肌肉。