Impact shock and attenuation during in-line skating
Impact shock and attenuation during in-line skating
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DOI：
10.1097/00005768-199708000-00013
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发表时间：
1997-08-01
期刊：
影响因子：
--
通讯作者：
Caldwell, GE
中科院分区：
文献类型：
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作者：
Mahar, AT;Derrick, TR;Caldwell, GE
虽然在跑步过程中与脚接触相关的冲击和震动衰减已经被广泛研究，但对直排轮滑（ILS）过程中的这些现象知之甚少。本研究的目的是描述ILS的这些冲击特性，并检验ILS过程中的冲击比以优选速度运行时的冲击低的假设。受试者在跑步机上以首选速度跑步和滑冰，胫骨远端和头部都装有低质量加速度计。胫骨和头部的加速度数据在站立时被用来计算峰值加速度（PA），峰值频率（PF），和中值频率（MedF）。通过比较PA值和计算头部和胫骨频谱之间的传递函数，量化胫骨和头部之间的冲击衰减（IA）。PA，PF，和MedF值显着低于ILS比在运行的胫骨和头部的数据，而IA是相似的两个运动。ILS条件在10和20 Hz之间的频率范围内几乎没有功率，这与脚撞击地面有关。它的结论是，在行滑冰的结果，在冲击冲击冲击身体与每个脚接触，并可能是一个有用的锻炼方式，为那些希望减少冲击冲击有氧训练。
Although impact and shock attenuation associated with foot contact during running has been studied extensively, much less is known about these phenomena during in-line skating (ILS). The purpose of this study was to describe these impact characteristics for ILS and to test the hypothesis that there is lower impact shock during ILS than in running at preferred velocities. Subjects ran and skated on a treadmill at preferred velocity, with low-mass accelerometers attached to both the distal tibia and head. Tibia and head acceleration data during stance were used to calculate peak acceleration (PA), peak frequency (PF), and median frequency (MedF). Impact attenuation (IA) between the tibia and head was quantified by comparison of PA values and by calculating a transfer function between the head and tibia frequency spectra. PA, PF, and MedF values were significantly lower in ILS than in running for both tibial and head data, whereas IA was similar between the two movements. The ILS condition exhibited almost no power in the frequency range between 10 and 20 Hz, which has been associated with the foot impacting the ground. It is concluded that in-line skating results in less impact shock to the body with each foot contact, and may be a useful exercise modality for those wishing to reduce impact shock during aerobic training.