拇外翻是最常见的足部畸形之一，受多重因素影响，其一为长期穿着束紧、尖头及高跟鞋具。轻、中度拇外翻常因无疼痛而常被患者忽视，达到重度时，又需临床手术矫正等手段。本项目在前期青年基金基础上，提出足部无束缚运动模式的行为矫正，对轻、中度拇外翻足女性进行18个月不同强度的干预，追踪记录足形数据及步态特征。结合不同足形数据建立特定的足部模型，同时开展运动生物力学测试。运用实验测试的力学结果，有限元模拟，分析不同模型内部应力、应变变化；基于OpenSim模型，计算相关肌肉肌腱长度和力臂等肌骨系统的机能变化。旨在探究第一跖趾关节形变的生物力学机理，及下肢肌骨系统在形变过程的机能，提出全新的轻、中度拇外翻畸形足的行为医学干预和康复方案。

Hallux valgus is one of the most common foot deformity, influenced by multi factors, one of which is the long term wearing of restricted, sharp-head or high heeled shoes. Base on the hallux valgus angle, it was defined as mild, moderate and severe deformity. The mild and moderate deformity are often neglected without pain or any discomfort; however, while becoming severe deformity, acute pain often disabled patients’ normal daily life and work. It needs surgery cutter and reclamation. Based on our previous research findings, the foot non-restrictions motion patterns is proposed in this study to conduct a 18-month longitudinal motion intervention, recording the foot morphology date and gait characteristics. Combining the kinetic results from biomechanical test, the finite element simulation analyze the internal stress strain properties of different models. The functions of musculoskeletal system, like muscle-tendon and lever arm length and force etc., will be calculated based on OpenSim model. It is aimed to investigate the biomechanical mechanism of the first metatarsophalangeal joint, and functions of lower limb musculoskeletal system during metatarsophalangeal deformation. A new behavioral medicine scheme will be proposed to rehabilitate and intervene mild and moderate hallux valgus.