Relationship between vertical ground reaction force and speed during walking, slow jogging, and running
Relationship between vertical ground reaction force and speed during walking, slow jogging, and running
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DOI：
10.1016/0268-0033(95)00068-2
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发表时间：
1996-07-01
影响因子：
1.8
通讯作者：
Spengler, DM
中科院分区：
文献类型：
--
作者：
Keller, TS;Weisberger, AM;Spengler, DM
目标。为了获得垂直地面反作用力(GRF)时间历史与步态速度、跑步风格和性别之间的描述性信息。男性和女性受试者在步行、慢跑、慢跑和在室内平台上跑步时进行了GRF-时间历史测量。以前的研究已经建立了男性受试者在3-6m S(-1)速度下跑步的GRF描述符变量，但很少有关于较慢或较快跑的描述性数据，也没有研究单独报道女性受试者的GRF描述符。记录了13名男性和10名女性休闲运动员在S(-1)速度在1.5m到3.0m之间的步行和慢跑以及在3.5m到6.0m S(-1)速度下跑步的GRF-时间历史。对S(-1)规定速度在0.2m范围内的垂直GRF-时间数据进行分析，以确定最大推力GRF(F-z)和加载速率(G(Z))。无论是男性还是女性受试者，在步行和跑步过程中，F-z从1.2BW线性增加到6.0m S(-1)时的2.5BW，在较快的速度下保持不变。F-z与G(Z)呈线性相关，在此速度范围内，G(Z)的范围为8~30bw S(-1)。慢跑与步行或快跑相比，F-z和G(Z)增加50%。男性和女性受试者的GRF描述符数据和速度关系相似。当受试者在慢跑过程中采用较高的、较不固定的重心时，撞击力最大。相关这些结果表明，可以为男性和女性建立垂直GRF标准，而较低、较低的固定重心的慢跑或快跑可以减少冲击力。版权所有(C)1996，爱思唯尔科学有限公司出版。
Objective. To obtain descriptive information between vertical ground reaction force (GRF)-time histories and gait speed, running style, and gender.Design. GRF-time history measurements were obtained from male and female subjects during walking, slow jogging, jogging and running on an indoor platform.Background. Previous studies have established GRF descriptor variables for male subjects running at speeds from 3 to 6 m s(-1), but very little descriptive data exists for slower or faster running, nor have previous studies reported GRF descriptors separately for female subjects.Methods. GRF-time histories were recorded for 13 male and 10 female recreational athletes during walking and slow jogging at speeds between 1.5 and 3.0 m s(-1), and running at speeds between 3.5 and 6.0 m s(-1). Vertical GRF-time data for trials with speeds within 0.2 m s(-1) of the prescribed speed were analysed to determine thrust maximum GRF (F-z) and loading rate (G(z)).Results. In both male and female subjects, F-z increased linearly during walking and running from 1.2 BW to approximately 2.5 BW at 6.0 m s(-1), remaining constant du ring forward lean sprinting at higher speeds. F-z was linearly correlated to G(z), the latter ranging from 8 to 30 BW s(-1) over this speed range. Slow jogging was associated with a > 50% higher F-z and G(z) in comparison to walking or fast running.Conclusions. Similar GRF descriptor data and velocity relationships were obtained for male and female subjects. Impact forces were greatest when the subjects adopted a higher, less fixed centre of gravity during slow jogging.RelevanceThese results suggest that vertical GRF norms can be established for male and female subjects alike, and that slow or fast running with a lower, fixed centre of gravity decreases impact forces. Copyright (C) 1996 Published by Elsevier Science Ltd.