[Clusters structure of psychomotor and coordination sphere of primary school children]

The main objective of our research is characterization of various motor profiles among primary school age children. We examined 89 Moscow schoolchildren of 8-10 years old, not involved in sports. We analyzed 25 indices from psychomotor, psychophysiologic, posturography and locomotor testing during our research. Children were divided in 4 groups according to its motor coordination character similarity by applying cluster analysis (k-means method). Thereby we obtained 4 clusters which, as we suppose, can be identified as different types of motor coordination or "individual motor profiles" of 8-10 years old children. The results of our research shows that there are no significant differences in age, gender, body composition within clusters, thus it can be used during sport-selection process. The most typical features of 1st cluster representatives are: the ability to anticipate and a high wrist speed; the 2nd cluster representatives are more successful in rapid, rhythmic, automatic actions, based on a mechanism of intrinsic programming. Representatives of the 3rd cluster are notable for a low level of postural control, smooth, accurate and rhythmic arm actions based on a visual feedback, and advanced sense of tempo and space sense. Representatives of the 4th cluster shows highest level of development of coordination ability, which are significant for them in reaching results in various hard-coordination sports and labor activities.