1987～1997年世界田径投掷项目运动成绩发展态势及其致因初探

运用文献资料法，常规数理统计法及灰色建模理论等，对１９８７～１９９７年间世界投掷项目运动成绩发展态势进行了初步探讨。指出了哪些项目是发展的，哪些项目是衰退的。并对其发展和衰退的原因从训练学和社会学等角度作了系统的分析。

Primary Study on the Situations and Causes of the Sports Results of Jaculation Items of the World Tracks and Fields from 1987 to 1997

Jaculation items of the tracks and fields, which is subject to the groups of category of physical forces, is a typical item of speediness and strength. It's obviously lack of studies on the developmental situations of this item ever since. Based on the sports results of every jaculation items, and under the backgrounds of training practices and social praxis, this paper carries through a primary study on the developmental situations of the sports results on jaculation items of the world tracks and fields from 1987 to 1997, from the aspects of sociology and drillology, and by the way of the laws of literatures and data, routine symbolic statistics and theory of grayness modeling. As a conclusion, we deem that the rest men and women items declined as a whole except for man javelin item which engendered a wholly developmental situation caused by the alteration of the javelin's barycenter in 1986.