The aim of the study was to determine the latent structure of the group of motor manifestations, which are under control and dominant influence of the mechanism of energy regulation. The measurements were performed on a sample of 180 boys and girls from four kindergartens in Rijeka. The battery consists of 24 motor measurements with the following characteristics; suitable for the motor knowledge and abilities of the pre-school children, the complexity of conducting the tests was as low as possible and small amount of necessary equipment to carry out the tests. Seven factors were extracted using the GK criterion. According to the hypothesis some of the extracted factors have confirmed its existence, such as factor of explosive power, dynamic power and static endurance. It is necessary to make some modification of some measure instruments for static endurance as well as to test its on larger sample. This experimental study is contribution to a very small number of studies in Croatia on the sample of preschools children. The conclusions of this study are contributing to the results of the different former studies concerning the anthropological characteristics of the children at the age of 5 and 6. In the end, it is important to emphasize the complexity of this experimental study with the key terms, preschool children and measurement process of power, as well as at the same time the necessity of effective collaboration with parents, principal and kindergarten teachers, physical education teachers, doctors and pedagogues, who have also taken part in this experimental study.