| Abstract |
| This study investigated the effects of three-dimensional(3D) functional stay configurations on the wearing performance of posture-correcting lumbar support belts by comparing conventional flat stays with 3D-curved stays designed to reflect lumbar lordosis angles associated with spinal-pelvic balance. The functional stays were fabricated using fused deposition modeling(FDM) with shape-memory thermoplastic polyurethane(SM-TPU), and two types of lumbar support belt prototypes were developed to incorporate each stay design. To objectively evaluate the effects of stay geometry, electroencephalography(EEG) was employed to assess neurophysiological responses during belt wear. Subsequently, subjective wearing evaluations were conducted with ten healthy female participants in their 20s, who performed standardized daily activities in seated and standing postures. Wearing performance was assessed using an 18-item questionnaire addressing wearing comfort, mobility, postural support, and user preference. The results demonstrated that the structural configuration of the functional stay significantly influenced both neural responses and wearing performance. EEG analysis revealed distinct differences in brain activity depending on the stay configuration, indicating variations in relaxation and attention-related responses during wear. Compared with flat stays, the 3D-curved stays exhibited superior conformity to body contours, resulting in enhanced wearing comfort, improved mobility, and a trend toward reduced localized pressure. Furthermore, the 3D-curved stays, designed based on lumbar lordosis angles, provided more effective lower back support and facilitated the maintenance of a neutral lumbar posture. These findings suggest that 3D structural design is a critical factor in optimizing ergonomic fit and functional efficacy in lumbar support systems. |
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| Key Words |
| 허리 보호대, 착용 쾌적감, 3차원 구조 설계, 요추전만 각도, 뇌파, EEG, Lumbar Support Belt, Wearing Comfort, Three-Dimensional Structural Design, Lumbar Lordosis Angle, EEG |
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