BACKGROUND:The risk of developing injuries during standing work may vary between persons with different foot types. High arched and low arched feet, as well as rigid and flexible feet, are considered to have different injury profiles, while those with normal arches may sustain fewer injuries. However, the cut-off values for maximum values (subtalar position during weight-bearing) and range of motion (ROM) values (difference between subtalar neutral and subtalar resting position in a weight-bearing condition) for the medial longitudinal arch (MLA) are largely unknown. The purpose of this study was to identify cut-off values for maximum values and ROM of the MLA of the foot during static tests and to identify factors influencing foot posture.METHODS:The participants consisted of 254 volunteers from Central and Northern Denmark (198 m/56 f; age 39.0 +/- 11.7 years; BMI 27.3 +/- 4.7 kg/m2). Navicular height (NH), longitudinal arch angle (LAA) and Feiss line (FL) were measured for either the left or the right foot in a subtalar neutral position and subtalar resting position. Maximum values and ROM were calculated for each test. The 95% and 68% prediction intervals were used as cut-off limits. Multiple regression analysis was used to detect influencing factors on foot posture.RESULTS:The 68% cut-off values for maximum MLA values and MLA ROM for NH were 3.6 to 5.5 cm and 0.6 to 1.8 cm, respectively, without taking into account the influence of other variables. Normal maximum LAA values were between 131 and 152degrees and normal LAA ROM was between 1 and 13degrees. Normal maximum FL values were between 2.6 and 1.2 cm and normal FL ROM was between 0.1 and 0.9 cm. Results from the multivariate linear regression revealed an association between foot size with FL, LAA, and navicular drop.CONCLUSIONS:The cut-off values presented in this study can be used to categorize people performing standing work into groups of different foot arch types. The results of this study are important for investigating a possible link between arch height and arch movement and the development of injuries.
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机译：背景：站立工作期间受伤的风险可能因脚型不同的人而异。高足弓和低足弓的脚，以及刚性和柔韧性的脚，被认为具有不同的伤害特征，而那些具有正常足弓的人可能受到较少的伤害。但是，内侧纵弓（MLA）的最大值（承重时距下tal骨位置）和运动范围（ROM）值（负重时距下sub骨中位与距下resting骨静止位置之间的差异）的临界值在很大程度上是未知的。这项研究的目的是确定静态测试过程中足部MLA的最大值和ROM的临界值，并确定影响足部姿势的因素。方法：参与者包括254位来自丹麦中部和北部的志愿者（198 m / 56 f；年龄39.0 +/- 11.7岁； BMI 27.3 +/- 4.7 kg / m2）。在距骨下中性位置和距骨下静止位置测量左脚或右脚的航海高度（NH），纵向足弓角（LAA）和Feiss线（FL）。计算每个测试的最大值和ROM。 95％和68％的预测间隔用作临界值。结果：未考虑影响因素的最大MLA值和MLA ROM NH的68％临界值分别为3.6至5.5 cm和0.6至1.8 cm。其他变量。正常的最大LAA值在131至152度之间，而正常的LAA ROM在1至13度之间。正常的最大FL值在2.6至1.2 cm之间，而正常的FL ROM在0.1至0.9 cm之间。多元线性回归的结果显示，脚的大小与FL，LAA和舟状垂体之间存在关联。结论：本研究中给出的临界值可用于将站立站立的人分为不同的足弓类型。这项研究的结果对于研究足弓高度和足弓运动与损伤发展之间的可能联系非常重要。
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