Hypothesis of our study is as follows: we assume that physical preparation of girls of the same age and their attitude towards physical education shall differ in different stages of their organism maturity. Goal of the study is to define a relation between physical preparation of girls of different ages and their attitude towards physical education and their sexual maturity. The research was performed in Vilnius Gerosios Vilties gymnasium in classes of 6-9 grade in the year 2004-2005. One hundred and forty five girls of basic health group of age 12-17 were participating in the research. Research methods applicable in the study were as follow: analysis and summary of literature recourses, testing, defining stage of sexual maturity, questionnaire filling, mathematical statistics, documentation and documentation received comparative analysis. We were examining weight, height and thorax size of schoolchildren. Tests of physical development were executed in school health care consulting room. Physical preparation of girls was being defined according to EUROFIT tests (300m running, 60m running, standing long jump; sitting and lying, trunk strength). The sexual maturity stage was defined by nurse in consulting room of Vilnius Secondary School of Gerosios Vilties according to methods by A.Stavickaja and D.Aron (in 1959), which was modified by V.Vlastovskis (in 1976). The comparative analysis of present results and results received 25 years ago was performed. ... [to full text]