Biomechanical analysis of seated posture and ergonomics in workspace interior design for improved user comfort

Prolonged sitting in office environments poses significant occupational health risks, necessitating effective ergonomic interventions. This study investigated the biomechanical aspects of seated posture and the effectiveness of ergonomic interventions in a technology park setting. A 12-week randomized controlled study was conducted with 39 office workers divided into three groups: Control Group (n = 13), Intervention Group A (ergonomic setup, n = 13), and Intervention Group B (ergonomic setup with feedback, n = 13). Measurements included spinal angles, muscle activity (%MVC), seat pressure distribution, and postural compliance. Spinal alignment improved significantly in intervention groups, with Intervention Group B showing superior improvement (+32.6 ± 3.8°) compared to Intervention Group A (+24.8 ± 3.5°) and control group (−2.5 ± 1.2°, p < 0.001). Muscle activity in the trapezius reduced significantly in Intervention Group B (from 22.4% ± 3.2%MVC to 13.1% ± 2.1%MVC, p < 0.001). Peak pressure at ischial tuberosities decreased by 29.5% in Intervention Group B compared to control. By week 12, postural compliance reached 85.4% ± 6.8% in Intervention Group B versus 47.2% ± 5.0% in the control group, with user adaptation rates achieving 86.1% ± 6.9% compared to 45.6% ± 4.8% in the control (p < 0.001). The combination of ergonomic setup and real-time feedback demonstrated superior outcomes in improving seated posture, reducing muscle fatigue, and optimizing pressure distribution. Intervention Group B showed significantly better results across all parameters, with sustained improvements over the 12 weeks. These findings suggest that integrated ergonomic interventions with feedback mechanisms are more effective than traditional approaches in promoting healthy sitting behavior in office environments.