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对当今世界优秀男女百米跑运动员的主要技术参数进行了研究,其主要结果如下:(1)步频与步长是决定成绩的最主要因素,步频和步长之间存在着高度负相关,其相关度是男子大于女子,步频与步长之比,男女平均值分别为1.98∶1,2.18∶1,若用 X_1、X_2分别表示步频和步长,则可用一个很精确的函数表达式表示推算成绩(?)值来,其公式为:男:(?)=22.7305-1.403X_1-2.8996X_2,女:Y=31.7183-2.3685X_1-4.9787X_2。(2)步频呈先升后降规律,最大值在30～60米段,步幅呈逐渐上升趋势,说明在60米后主要是尽可能地提高步幅,同时尽量减少步频下降幅度,即在不能继续维护最大步频情况下,在已获得最大速度后,应充分利用身体向前惯性,主动“放松”(下转第52页)
The main technical parameters of today’s world men’s and women’s 100 meters runners are studied. The main results are as follows: (1) The step frequency and the step size are the main factors that determine the result. There is a highly negative correlation between step frequency and step length , The correlation between men and women is greater than the ratio of steps and steps, the average male and female were 1.98:1,2.18:1, if using X_1, X_2, respectively, step and step length, you can use a very accurate function The expression represents the value of the projected score (?), The formula is: Male: (?) = 22.7305-1.403X_1-2.8996X_2, Female: Y = 31.7183-2.3685X_1-4.9787X_2. (2) The stride frequency first and then decrease, the maximum value is in the range of 30-60 meters, and the stride rate is gradually increasing. It shows that after 60 meters, it is mainly to increase the stride rate as much as possible while reducing the stride rate, That is, can not continue to maintain the maximum pace of the case, has been the maximum speed, you should make full use of the body forward inertia, take the initiative to “relax” (continued on page 52)