The idea of this book arises from a series of studies and works of culmination of studies, of masters and doctorate that respond to the Community Project of Rhythmic Gymnastics of the University of Sciences of the Physical Culture and Sports (UCCFD) "Manuel Fajardo" of Havana, sponsored by the Center of Studies of Psychology of the Physical Activity and Sports (CEPAFD) of this Cuban university, that develops the line of investigation: "Influence of the psychological and psychosocial aspects in the school sport". It compiles a modest part of the thought promoted about the role of specialized perceptions in the technique of Gymnastics and a practical experience with girls who are initiated in Rhythmic Gymnastics, in this community project.