目的 久坐疲劳下，人们无意识形成的不健康姿态导致颈椎、腰椎等慢性疾病逐渐年轻化。在长时间办公状态下，帮助青年人群保持健康的坐姿，并降低身体的负担至最小是关键。方法 运用KJ法，通过坐姿观察、用户访谈、用户旅程图构建、需求筛选合并等流程，分析目标人群在办公场景下的姿态变化及调节行为，并获取13项设计需求

Under sedentary fatigue, the unconscious unhealthy posture of people leads to the gradual rejuvenation of chronic diseases such as cervical vertebrae and lumbar vertebrae. In the case of long office hours, it is key to help young people maintain a healthy sitting posture and reduce the load of sedentary activities on their bodies. Using the KJ method, through processes such as observing the sitting postures of the target group, conducting user interviews, creating user journey maps, combining demand screening, and analyzing the postural changes and adjustment behaviors of the target group in office settings, 13 key design requirements were identified. Based on this, a hierarchical analysis of user demands was carried out by KANO model. Then, a FBM model was used to transform the expected attribute and charm attribute into the target behavior for cost screening. Ultimately, the low-cost and low-ability behavior was retained, the behavior-oriented improvement design of office furniture was carried out around the multi-posture alternating office. In conclusion, through the application of the KJ method -KANO model -FBM model, the demand level of sedentary young people for office furniture is clarified. Introducing the posture of kneeling, squatting and sitting cross-legged into office behavior provides a new solution and research idea for relieving the pressure of sedentary on the body.