Timing of lower extremity joint actions during treadmill running.
Timing of lower extremity joint actions during treadmill running.
复制标题
跑步机跑步时下肢关节动作的时机。
DOI：
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发表时间：
1992
影响因子：
4.1
通讯作者：
K. Holt
中科院分区：
文献类型：
--
作者：
Joseph Hamill;Barry T. Bates;K. Holt
有人认为距下关节和膝关节之间的时间中断可能是膝关节损伤的可能机制。也有文献表明，鞋子的构造可以改变后脚的运动。本研究的目的是描述在跑步机跑步时，穿不同的鞋子时，离下关节和膝关节活动之间的关系。12名健康受试者分别穿着三种鞋底硬度不同的跑鞋（C1, 70; C2, 55; C3, 45）进行跑步。在5分钟跑步的最后一分钟，拍摄每个受试者/条件的后方和矢状面高速视频（200 Hz）。利用反射标记确定后脚角度和矢状面膝关节角度。这双鞋还进行了中底材料冲击测试。冲击试验结果表明，中底之间的g峰值和到达g峰值的时间呈线性趋势，中底越结实，g峰值越大，到达g峰值的时间越短。运动学分析结果表明，不同鞋型对膝关节屈曲参数的影响没有显著差异。然而，两种较硬的中底条件（C1和C2）和较软的中底条件（C3）在最大内翻的幅度和时间上存在显著差异，表明这些参数呈非线性趋势。柔软的中底表现出更大的内旋值和更短的时间达到最大内旋。（摘要删节250字）
It has been suggested that a disruption in timing between the subtalar and knee joints may be a possible mechanism for knee injury. It has also been documented that shoe construction can alter rearfoot motion. The purpose of the study was to describe the relationship between the subtalar and knee joint actions during the support phase of treadmill running while wearing different shoes. Twelve healthy subjects ran in each of three running shoes with unique midsole durometers (C1, 70; C2, 55; C3, 45). High-speed video (200 Hz) of the rear and sagittal views of each subject/condition were taken during the last minute of a 5-min run. Retro-reflective markers were processed to determine the rearfoot angle and the sagittal view knee angle. The shoes were also subjected to a midsole material impact test. The impact test results indicated a linear trend in peak g and time to peak g across midsoles with the firmer midsole having a greater peak g and a shorter time to peak g. The results of the kinematic analysis indicated that there were no significant differences among the shoe conditions for the knee flexion parameters. However, there were significant differences in both the magnitude and the time to maximum pronation between the two firmer midsole conditions (C1 and C2) and the softer midsole condition (C3), indicating a nonlinear trend for these parameters. The softer midsole exhibited greater pronation values and a shorter time to maximum pronation.(ABSTRACT TRUNCATED AT 250 WORDS)