Starting from standing; why step backwards?
Starting from standing; why step backwards?
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DOI：
10.1016/s0021-9290(00)00178-0
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发表时间：
2001-02-01
影响因子：
2.4
通讯作者：
Storm, J
中科院分区：
文献类型：
--
作者：
Kraan, GA;van Veen, J;Storm, J
在推举时，身体的重心必须放在脚的前面，以防止翻跟头。当从站姿开始冲刺时，后退一步是获得最大加速所必需的。本研究的目的是量化推离腿后退的积极贡献，这似乎是适得其反的。10名被试被要求以三种不同的方式冲刺起跑：(a)由被试主动站在力台前起跑；(b)由被试站在力台上起跑，不允许后退；(c)从起跑位置起跑，一条腿在力台前，一条腿在力台上起跑。95%的运动员站姿起跑时后退一步。启动型(a)蹬蹬力最大，蹬蹬力形成时间最短。结果表明，后退一步对力和功率有积极的贡献。我们提倡制定一个培训计划，特别关注倒退现象。2001爱思唯尔科学有限公司版权所有。
At push-off the mass centre of gravity of the body must be positioned in front of the foot to prevent a somersault. When starting a sprint from out the standing position the use of a step backwards is necessary for maximal acceleration. The aim of the present study was to quantify the positive contribution to push off From a backward step of the leg, which seems to be counterproductive. Ten subjects were instructed to sprint start in three different ways: (a) starting from the standing position just in front of the force platform on the subject's own initiative, (b) starting from the standing position on the force platform with no step backward allowed, and (c) starting out of the starting position with one leg in front of the force platform and the push-off leg on the force platform. A step backwards was observed in 95% of the starts from the standing position. The push-off force was highest in starting type (a), which had the shortest time to build up the push-off force. The results indicate a positive contribution to the force and power from a step backwards. We advocate developing a training program with special attention to the phenomenon step backwards. (C) 2001 Elsevier Science Ltd. All rights reserved.