Employees who work long hours frequently complain of muscle fatigue caused by prolonged sitting. As a result, products that assist them when resting in a chair in a reclining position, in order to relieve fatigue and improve comfort are required. To ensure that the new product works as intended, a usability test based on prototyping must be developed. The research process was divided into three stages: firstly, the development of the perception assessment questionnaire; secondly, a validated factor analysis (CFA) was conducted on the perception assessment data of 26 subjects and the measurement model was fitted to verify the reliability and validity of the questionnaire; finally, the sEMG technique was used to verify the comfort level of 21 subjects. Based on usability experiments and an exploration of human factor relationships, this study develops a prototype testing model, which focuses on the comfort perception of body parts, as a means of promoting innovation in the design and manufacturing industry.

长时间工作的员工经常抱怨久坐导致肌肉疲劳。因此，需要能够帮助他们以斜倚姿势坐在椅子上休息的产品，以缓解疲劳并提高舒适度。为确保新产品按预期工作，必须开发基于原型的可用性测试。研究过程分为三个阶段：第一，感知评估问卷的开发；其次，对26名被试的感知评价数据进行验证因子分析（CFA），拟合测量模型，验证问卷的信度和效度；最后，使用 sEMG 技术验证了 21 名受试者的舒适度。基于可用性实验和对人为因素关系的探索，