The Effects of Running Cadence Manipulation on Plantar Loading in Healthy Runners
The Effects of Running Cadence Manipulation on Plantar Loading in Healthy Runners
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DOI：
10.1055/s-0033-1363236
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发表时间：
2014-08-01
影响因子：
2.5
通讯作者：
Suchomel, T.
中科院分区：
文献类型：
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作者：
Wellenkotter, J.;Kernozek, T. W.;Suchomel, T.
我们的目的是评估踏频操作对跑步过程中足底负荷的影响。参与者（n = 38）在跑步机上以他们喜欢的速度在3种条件下跑步：首选，5%增加，5%减少，同时使用鞋内传感器测量。记录30次右足着地的数据（接触时间[CT]、峰值力[PF]、力时间积分[FTI]、压力时间积分[PTI]和峰值压力[PP]）。进行多变量分析，以检测全足和4个足底区域的踏频之间的负载差异。足底负荷的差异发生在踏频条件之间。总足CT和PF较低，节奏较快，但没有观察到总足PP差异。更快的节奏减少CT，压力和力变量在脚跟和跖骨区域。增加步频并没有提高跖骨负荷;相反，当健康跑步者增加步频时，总的足部和所有区域都减少了。如果在每英里跑步中保持5%的步频增加，则尽管采取了增加的步数，但是每英里跑步时脚跟处的冲量将减少估计565体重 *s（BW*s），跖骨处的冲量将减少140- 170 BW *s。增加踏频可能有益于与足底负荷升高相关的过度使用性损伤。
Our purpose was to evaluate effects of cadence manipulation on plantar loading during running. Participants (n = 38) ran on a treadmill at their preferred speed in 3 conditions: preferred, 5 % increased, and 5 % decreased while measured using in-shoe sensors. Data (contact time [CT], peak force [PF], force time integral [FTI], pressure time integral [PTI] and peak pressure [PP]) were recorded for 30 right footfalls. Multivariate analysis was performed to detect differences in loading between cadences in the total foot and 4 plantar regions. Differences in plantar loading occurred between cadence conditions. Total foot CT and PF were lower with a faster cadence, but no total foot PP differences were observed. Faster cadence reduced CT, pressure and force variables in both the heel and metatarsal regions. Increasing cadence did not elevate metatarsal loads; rather, total foot and all regions were reduced when healthy runners increased their cadence. If a 5 % increase in cadence from preferred were maintained over each mile run the impulse at the heel would be reduced by an estimated 565 body weights*s (BW*s) and the metatarsals 140-170BW*s per mile run despite the increased steps taken. Increasing cadence may benefit overuse injuries associated with elevated plantar loading.