人是一种集群动物，因而活动多以群体形式进行，一般称之为“社会群体”。根据群体的组成方式通常把它分为正式群体和非正式群体。 　　体育社会学对体育群体的研究，大多集中在正式体育群体上，如运动队、班级等，对于非正式体育群体的研究较少涉及。笔者在多年的学校体育及班 Human beings are a group of animals, so activities are often carried out in groups, commonly referred to as “social groups.” It is usually divided into formal groups and informal groups based on the composition of the group. Sports sociology research on sports groups, mostly focused on formal sports groups, such as sports teams, classes, etc., for informal sports groups less involved. The author in many years of school sports and classes