Using the method of documentary,and expert interview method to compare the changes of the main contest rules of modern pentachlon since 1912 when it came into the Olympic Games for the first time,the study shows that since 1912 the main competition rules according to the generally can be divided into initial formation stage of development,heightening stage and the stage of progressive improvement;Factors that affect rule changes include the athlets'improving of technique and ability,the cleveloping of science and technology,and the demand of the commercial competition which demand on each other and are dialecticly intergrated.%运用文献资料法、专家访谈法等方法对1912年现代五项运动第一次进入奥运会至今的主要竞赛规则变化进行分析,研究表明:1912年至今的主要竞赛规则大致上可以分为初步形成发展阶段、突破提高阶段和逐步完善阶段三个阶段;影响规则变化的因素包括运动员技术和能力的提高、科技水平的发展及竞赛商业化的需求等,两者互为变化依据,是辩证统一的关系.
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