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一、研究目的 台阶试验,目前仍是国际上常用的确定人体心脏血管系统对定量的重体力负荷反应的重要方法之一,特别是在群众性的基础调查研究中更是有普遍性的现实意义。为此,我们对徐州市898名大、中、小学生进行试验,其目的是为测定各年级学生的试验指数,以及相近年级（年龄）学生之间,男、女生之间的差异,从而为科学地开展大、中、小学生的体育活动,提供学生心脏血管系统机能状态方面的可靠参数
First, the purpose of the study Step test, is still commonly used internationally to determine the human cardiovascular system to quantify the heavy load of one of the important ways of stress response, especially in the basic research of mass is more universal practical significance . To this end, we test 898 primary and secondary school students in Xuzhou with the aim of determining the test index of students of all grades and the differences between male and female students of similar grade (age) To carry out sports activities for primary, secondary and middle school students and provide reliable parameters of students’ performance status in the cardiovascular system