The Aim. The aim of this paper is to define the contractile characteristics of maximal isometric handgrip force and to establish possible differences between the students of the Universities of Chelyabinsk and Belgrade. The secondary aim is to create a practically applicable initial model in order to explore the mentioned characteristics in the future. Material and methods. For the purposes of this research, the overall sample of 225 subjects was tested. 91 subjects were from Russia and 134 were from Serbia. The results were gathered using a strain gage and a standardized isometric handgrip test protocol. The contractile properties of HG muscle force were measured in relation to three different contractile dimensions: the maximal muscle force (F max ), the maximal explosive muscle force (RFD max ), the time need for achieving maximal (tF max ) and maximal explosive (tRFD max ) muscle force. Results. This study has shown that there are no generally statistically significant differences for all observed variables of HG contractile characteristics between tested Russian and Serbian students. Based on the results of the present study, six different models of the equation for evaluation of HG contractile characteristics of female and male students, i.e. young adults, were made. All defined models are highly statistically significant, accurate and sensitive in the prediction of the general distributive position of an individual or particular group of subjects in relation to the measured contractile characteristics. Conclusions. The obtained results can generally indicate the stability of potential to exert the given contractile characteristic in relation to the population of similar evolutionary (Slavs) at different geographical background.

Abstract:The paper considers features of sensomotor integration of visuomotor reactions in female boxers. It is found that sportswomen have quicker reactions, but make more mistakes in complex choice reaction. Sensomotor integration of sensomotor reaction into functional systems of activity in female boxers is also associated more with accuracy of responsive actions than in reaction rate. Keywords: sensomotor reactions, sensomotor integration, women's boxing, skilled boxers. IntroductionIn 2012 women's boxing was included in the program of Summer Olympics, and since then it has been gaining popularity in the world [Shakhov, Damadaeva, 2012;Tcherkasova, 2013]. Women's boxing has features of surrogate sports, so it is expected that many highly skilled sportswomen are born with male somatotype as at birth they have large body mass (macrotype of physical development) and masculine dermatoglyphics [Sultanova, 2012]. However women boxers are inferior in development of speed, speed-power and other physical properties to male athletes [Vrublevskiy,2008;Sokha, 2002].Boxing is an arduous combative sport. The success of the sportsman's competitive strategy depends largely on efficiency of sensomotor integration that provides quickness and adequacy of the boxer's responsive actions (physical and operational actions) under time shortage and situational course of fighting [Korolev,2013;Charykova, 2009].Women's essential ambition to achieve high sport performance requires full-scale scientific substantiation and sets several topical issues for scientists and experts. One of these issues is study of features of sensomotor integration in functional systems of motor activity in women boxers. Sensomotor integration effectiveness allows formation of potent adaptive strategies in competitive fighting [Wolpert et al., 1995;Del Parcio et al., 2009;Le Runigo et al., 2010].

Purpose:Identify the age features of hockey players aged 13-16 years old physical development. Material:Elite hockey players (n = 83, age -13-16 years) were surveyed. Standard anthropometric methods for measuring length and body weight were used. The body mass index (BMI) was calculated. Results:The average value of the body length of hockey players did not differ from peers, who do not engage in sports. The cental distribution of the absolute values of the indicator relative to nomograms has been shifted to the right. Most hockey players had average body lengths. The excess of the average body weight of hockey players was recorded in comparison with the average population values. The cental distribution of absolute values was characterized by a significant shift to the right (range 3% -90% percentile). Most hockey players had a body weight "above average" (55-66%). The group of athletes with body weight and BMI "below average" was 6% (age from 13 to 15 years). Conclusions:The physical development of elite hockey players is characterized by an average body length with a tendency to shift to values "above average". The proportion of hockey players with mean body lengths below the midpopulation is very small. Elite hockey players are characterized by large body weight and BMI compared to peers who do not engage in sports. As the age increases from the morphological criteria, the body weight and BMI have the greatest value for the hockey player's success in sports selection.

Aim. The article deals with studying the features of sensorimotor integration and movement coordination in elite hockey players aged 15–16. Materials and methods. A prospective longitudinal study was performed in the competitive phase of preparation. Hockey players aged 15–16 participated in the study (n = 36; attackers and defenders). The control group consisted of  16-year-old students from the college of physical education (n = 15). We performed an examination with the help of NS-PsychoTest software and hardware equipment (Russia, Neurosoft). We assessed the functional status of cortical centers of the nervous system, as well as the speed and accuracy of simple and complex eye-motor reactions. We determined the level of sensorimotor and voluntary movement coordination with the help of tremorometry. Results. Compared to peers, hockey players aged 15–16 possess a higher level of functional indicators under interference conditions (p < 0.05 in all cases) and a better indicator of the concentration of excitation (p < 0.001). Hockey players are characterized by a better speed and accuracy of reaction under interference conditions (p < 0.001 in all cases) and better reaction to a moving object (p < 0.05 in all cases). Compared to peers not-involved in sports, elite hockey players aged 15–16 are characterized by a higher level of voluntary movement coordination with a static form of muscle contraction (p < 0.01). Conclusion. The specific conditions of the competitive activity of hockey players aged 15–16 contribute to an increase in the efficiency of the central nervous system under interference conditions by improving the concentration of excitation. Sensorimotor integration of the players of this age is also distinguished by better predictive accuracy in reactions to a moving object. The parietal-premotor level of movement regulation in hockey players develops in accordance with age-related features, while specific physical loads influence the improvement of voluntary movement coordination with a static form of muscle contraction.

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