鞋影响内侧纵弓(MLA)的生物力学特性,进而影响足的整体功能。以前大多数关于MLA的研究都是基于传统的皮肤标记运动捕捉,并且很难观察鞋内的真实脚部运动。因此,鞋子参数对跑步过程中自然MLA运动的影响仍然存在疑问。因此,这项研究旨在通过使用高速双荧光成像系统(DFIS)来研究Shod和赤脚跑步之间的MLA运动学差异。招募了15名健康的习惯性后脚跑步者。所有参与者都以3m/s±5%的速度奔跑,并在赤脚和shood条件下高架跑道。使用高速DFIS获取整个站立阶段MLA运动的射线照相图像,并计算了MLA的运动学。使用配对的样本t检验来比较MLA在站立和赤脚条件之间的站立阶段的运动学特征。与赤脚相比,穿鞋表现出显着变化(p<0.05)如下:1)第一meta骨在80%时横向移动较少,前平移减少20%,在站立阶段的10-70%时,优势较小;2)第一meta骨移动的倒置较少,占20-60%,在站立阶段的0-10%时,背屈较少;3)相对于跟骨的第一meta骨的倒置/外翻运动范围(ROM)减小;4)站立阶段的0-70%时的MLA角度减小;5)在Shood状态下,最大MLA角度和MLA角度ROM减小。基于高速DFIS,以上结果表明,穿鞋限制了MLA的运动,尤其是减小MLA角度,这表明鞋子限制了MLA的压缩和后坐力,这进一步影响了MLA的弹簧样功能。
Shoes affect the biomechanical properties of the medial longitudinal arch (MLA) and further influence the foot\'s overall function. Most previous studies on the MLA were based on traditional skin-marker motion capture, and the observation of real foot motion inside the shoes is difficult. Thus, the effect of shoe parameters on the natural MLA movement during running remains in question. Therefore, this study aimed to investigate the differences in the MLA\'s kinematics between shod and
barefoot running by using a high-speed dual fluoroscopic imaging system (DFIS). Fifteen healthy habitual rearfoot runners were recruited. All participants ran at a speed of 3 m/s ± 5% along with an elevated runway in
barefoot and shod conditions. High-speed DFIS was used to acquire the radiographic images of MLA movements in the whole stance phase, and the kinematics of the MLA were calculated. Paired sample t-tests were used to compare the kinematic characteristics of the MLA during the stance phase between shod and
barefoot conditions. Compared with
barefoot, shoe-wearing showed significant changes (p < 0.05) as follows: 1) the first metatarsal moved with less lateral direction at 80%, less anterior translation at 20%, and less superiority at 10-70% of the stance phase; 2) the first metatarsal moved with less inversion amounting to 20-60%, less dorsiflexion at 0-10% of the stance phase; 3) the inversion/eversion range of motion (ROM) of the first metatarsal relative to calcaneus was reduced; 4) the MLA angles at 0-70% of the stance phase were reduced; 5) the maximum MLA angle and MLA angle ROM were reduced in the shod condition. Based on high-speed DFIS, the above results indicated that shoe-wearing limited the movement of MLA, especially reducing the MLA angles, suggesting that shoes restricted the compression and recoil of the MLA, which further affected the spring-like function of the MLA.