Musculoskeletal Research Centre, Faculty of Health Sciences, La Trobe University, Bundoora 3086, VIC, Australia.
Gait Posture. 2010 Oct;32(4):519-23. doi: 10.1016/j.gaitpost.2010.07.013. Epub 2010 Aug 8.
Foot posture is thought to influence predisposition to overuse injuries of the lower limb. Although the mechanisms underlying this proposed relationship are unclear, it is thought that altered foot kinematics may play a role. Therefore, this study was designed to investigate differences in foot motion between people with normal- and flat-arched feet using the Oxford Foot Model (OFM). Foot posture in 19 participants was documented as normal-arched (n=10) or flat-arched (n=9) using a foot screening protocol incorporating measurements from weightbearing antero-posterior and lateral foot radiographs. Differences between the groups in triplanar motion of the tibia, rearfoot and forefoot during walking were evaluated using a three-dimensional motion analysis system incorporating a multi-segment foot model (OFM). Participants with flat-arched feet demonstrated greater peak forefoot plantar-flexion (-13.7° ± 5.6° vs -6.5° ± 3.7°; p=0.004), forefoot abduction (-12.9° ± 6.9° vs -1.8° ± 6.3°; p=0.002), and rearfoot internal rotation (10.6° ± 7.5° vs -0.2°± 9.9°; p=0.018) compared to those with normal-arched feet. Additionally, participants with flat-arched feet demonstrated decreased peak forefoot adduction (-7.0° ± 9.2° vs 5.6° ± 7.3°; p=0.004) and a trend towards increased rearfoot eversion (-5.8° ± 4.4° vs -2.5° ± 2.6°; p=0.06). These findings support the notion that flat-arched feet have altered motion associated with greater pronation during gait; factors that may increase the risk of overuse injury.
足型被认为会影响下肢过度使用损伤的易感性。虽然这种拟议关系的机制尚不清楚，但人们认为改变的足部运动学可能起作用。因此，本研究旨在使用牛津足部模型（OFM）研究正常足弓和扁平足之间的足部运动差异。通过包含负重前后位和侧位足部 X 线片测量的足部筛查方案，将 19 名参与者的足部姿势记录为正常足弓（n=10）或扁平足（n=9）。使用包含多节段足部模型（OFM）的三维运动分析系统评估了两组在行走时胫骨、后足和前足的三轴运动差异。扁平足组的前足跖屈峰值（-13.7°±5.6° vs -6.5°±3.7°；p=0.004）、前足外展峰值（-12.9°±6.9° vs -1.8°±6.3°；p=0.002）和后足内旋峰值（10.6°±7.5° vs -0.2°±9.9°；p=0.018）均大于正常足弓组。此外，扁平足组的前足内收峰值（-7.0°±9.2° vs 5.6°±7.3°；p=0.004）减小，后足外翻峰值增加（-5.8°±4.4° vs -2.5°±2.6°；p=0.06）。这些发现支持了扁平足在步态中存在与过度旋前相关的改变运动的观点；这些因素可能会增加过度使用损伤的风险。
