The objectives of this study were to determine the amplitude of movement differences and asymmetries between feet during the stance phase and to evaluate the effects of foot orthoses (FOs) on foot kinematics in the stance phase during running. In total, 40 males were recruited (age: 43.0 ± 13.8 years, weight: 72.0 ± 5.5 kg, height: 175.5 ± 7.0 cm). Participants ran on a running treadmill at 2.5 m/s using their own footwear, with and without the FOs. Two inertial sensors fixed on the instep of each of the participant’s footwear were used. Amplitude of movement along each axis, contact time and number of steps were considered in the analysis. The results indicate that the movement in the sagittal plane is symmetric, but that it is not in the frontal and transverse planes. The right foot displayed more degrees of movement amplitude than the left foot although these differences are only significant in the abduction case. When FOs are used, a decrease in amplitude of movement in the three axes is observed, except for the dorsi-plantar flexion in the left foot and both feet combined. The contact time and the total step time show a significant increase when FOs are used, but the number of steps is not altered, suggesting that FOs do not interfere in running technique. The reduction in the amplitude of movement would indicate that FOs could be used as a preventive tool. The FOs do not influence the asymmetry of the amplitude of movement observed between feet, and this risk factor is maintained. IMU devices are useful tools to detect risk factors related to running injuries. With its use, even more personalized FOs could be manufactured.

中文翻译：

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在跑步和四肢不对称的站立阶段足部矫形器使用的基于MU的效果评估

这项研究的目的是确定站立阶段脚部之间运动差异和不对称的幅度，并评估跑步阶段站立脚部矫形器（FOs）对脚部运动学的影响。总共招募了40名男性（年龄：43.0±13.8岁，体重：72.0±5.5 kg，身高：175.5±7.0 cm）。参与者在有和没有FO的情况下，使用自己的鞋类以2.5 m / s的速度在跑步机上跑步。使用了两个惯性传感器，这些惯性传感器固定在参与者鞋子的脚背上。分析中考虑了沿每个轴的移动幅度，接触时间和步数。结果表明，在矢状面中的运动是对称的，但在额状面和横向面上却不是。尽管这些差异仅在绑架情况下显着，但右脚显示出的运动幅度比左脚更大。当使用FO时，除了左脚和两脚合在一起的脚背-足底屈曲外，在三个轴上观察到的运动幅度都减小了。使用FO时，接触时间和总步长时间显着增加，但步数没有改变，这表明FO不干扰运行技术。运动幅度的减小将表明FO可用作预防工具。FO不会影响双脚之间观察到的运动幅度的不对称性，因此可以保持此风险因素。IMU设备是检测与行驶伤害有关的危险因素的有用工具。随着它的使用，