Data and Signal Processing Research Group, University of Vic-Central University of Catalonia, 08500 Vic, Spain.
Sport Performance Analysis Research Group, University of Vic-Central University of Catalonia, 08500 Vic, Spain.
Sensors (Basel). 2021 May 10;21(9):3277. doi: 10.3390/s21093277.
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.
本研究的目的是确定在站立阶段双脚之间的运动幅度差异和不对称性，并评估足部矫形器（FOs）对跑步时站立阶段足部运动学的影响。共有 40 名男性被招募（年龄：43.0±13.8 岁，体重：72.0±5.5kg，身高：175.5±7.0cm）。参与者以 2.5m/s 的速度在跑步机上跑步，穿着自己的鞋子，并分别在穿着和不穿着 FO 的情况下进行测试。在参与者鞋子的脚背处各固定两个惯性传感器。在分析中考虑了沿每个轴的运动幅度、接触时间和步数。结果表明，矢状面的运动是对称的，但额状面和横切面不是。右脚的运动幅度比左脚大，但这些差异仅在展宽时才有统计学意义。使用 FO 时，三个轴的运动幅度都减小，除了左足和双足的背屈-跖屈。使用 FO 时接触时间和总步时显著增加，但步数没有改变，这表明 FO 不会干扰跑步技术。运动幅度的减小表明 FO 可以用作预防工具。FO 不会影响双脚之间观察到的运动幅度不对称性，并且这种风险因素仍然存在。IMU 设备是检测与跑步受伤相关的风险因素的有用工具。通过使用它，可以制造出更个性化的 FO。
