队员身心特征：八年级属于少年到青年的过渡阶段。这一阶段队员身体发育迅速,心理发展需求与现实身心状况之间的矛盾常引发强烈冲突,致使他们表现出半成熟、半幼稚的过渡性特点。他们思维的成熟性日渐加强,开始学习全面地看问题,社会性情感日益丰富和强烈,情感常随道德价值判断而改变；能根据自己的特点选择兴趣爱好,开始以地位相称、态度一致和情趣相投等原则来选择交往对象；性意识普遍萌生,喜爱与异性同学一起参加活动；独立意识明显增强, Physical and psychological characteristics of team members: eighth grade belongs to the transitional phase of youth to youth. During this stage, the team members developed rapidly and the contradiction between the psychological development needs and the actual physical and mental conditions often caused strong conflicts, resulting in their semi-mature and semi-naive transitional features. Their maturity of thinking is increasingly strengthened, begin to learn to look at the problem comprehensively, the social emotion is richer and stronger, the emotion often changes with the judgment of the moral value; can choose the hobby according to one’s own characteristic, starts with the status commensurate, the unanimous attitude and the interest Similarity and other principles to choose the object of interaction; sexual awareness generally initiation, love and heterosexual students to participate in activities; independence increased significantly,