Comparison of methods for kinematic identification of footstrike and toe-off during overground and treadmill running.
Comparison of methods for kinematic identification of footstrike and toe-off during overground and treadmill running.
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DOI：
10.1016/j.jsams.2010.03.006
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发表时间：
2010-11
影响因子：
4
通讯作者：
Davis IS
中科院分区：
文献类型：
--
作者：
Fellin RE;Rose WC;Royer TD;Davis IS
在步态分析中，往往需要对站立周期进行识别。通常使用力板，但在没有力板的情况下，也可以使用运动学数据。五种运动学方法已经在以前的文献中描述过。然而，这些方法并没有在地上或跑步机上进行比较。因此，本研究的目的是比较这五种识别站姿相位的运动学方法在地上和跑步机上的垂直地面反力数据。我们招募了40名休闲跑步者（20名男性）进行这项研究。20名跑步者在地上跑步时进行了仪器步态分析，20名在跑步机上跑步时进行了仪器步态分析。所有跑步者的速度为3.35 m·s−1。将每种运动学方法与从地面垂直反作用力（黄金标准）中确定的站位进行比较。然后在跑步机上重复此方法。结果表明，两种方法对脚法的测定是有效可靠的。这是远端足跟标记达到最小垂直位置的时间，以及同一标记的垂直速度从负变为正的时间。对于两种运行模式，这些方法的绝对误差在22.4 ms到24.6 ms之间。脚趾脱落的最佳识别方法是膝关节伸展峰值，地面跑步的绝对误差为4.9 ms，跑步机跑步的绝对误差为5.2 ms。利用自动运动学方法确定姿态将有助于研究人员在没有力板的情况下研究跑步。
When analysing gait, the identification of the period of stance is often needed. Forceplates are typically used, but in their absence kinematic data can be employed. Five kinematic methods have been previously described in the literature. However, these methods have not been compared to each other for overground or treadmill running. Therefore, the purpose of this study was to compare these five kinematic methods of identifying the stance phase with vertical ground reaction force data both during overground and treadmill running. We recruited forty recreational runners (20 males) for this study. Twenty runners underwent an instrumented gait analysis during overground running, and twenty were tested during instrumented treadmill running. All runners ran at 3.35 m·s−1. Each kinematic method was compared with stance identified from the vertical ground reaction force (gold standard) for overground running. This method was then repeated for treadmill running. Two methods were found to be valid and reliable for determining footstrike. These were the time when the distal heel marker reached a minimum vertical position, and when the vertical velocity of this same marker changed from negative to positive. These methods had absolute errors that ranged from 22.4 ms to 24.6 ms for both modes of running. Toe-off was best identified using peak knee extension, with absolute errors of 4.9 ms for overground running and 5.2 ms for treadmill running. Utilising automated kinematic methods of determining stance will aid researchers studying running when forceplates are unavailable.
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影响因子：
2.4
作者：
CAVANAGH, PR;LAFORTUNE, MA
通讯作者：
LAFORTUNE, MA
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2.4
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WINTER, DA;QUANBURY, AO;SHLOSSER, H
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SHLOSSER, H
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3.2
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1.8
作者：
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通讯作者：
Bennell, KL