PECULIARITIES OF MOTOR FITNESS STRUCTURE OF 9-YEAR-OLD GIRLS

Purpose. To determine the peculiarities of 9-year-old girls’ motor fitness structure. Materials and methods. The study involved 35 9-year-old girls. The children and their parents were informed about all the features of the study and gave their consent to participate in the experiment. The study used the following research methods: analysis of scientific and methodological literature, pedagogical observations, testing of motor fitness, probabilistic approach to assessing the learning process, methods of mathematical statistics. Results. The level of fitness of the 9-year-old girls is homogeneous by the development of “agility” and “movement coordination”, inhomogeneous – by the development of flexibility, arm strength, vestibular stability, and the level of proficiency in gymnastic exercises. A graphic representation of a two-factor model of testing results shows that the analysis identifies two sets of data with high correlation coefficients. The first set includes tests No. 12, 13, 14, and 7, which characterize the level of proficiency in gymnastic exercises and relative arm strength; the second – tests No. 1, 10, and 5, which characterize the level of movement coordination development. Conclusions. Based on factor analysis, it was found that the level of proficiency in exercises determines the variation of testing results by 28.394 %, and the development of motor skills is a priority in the educational process at primary school. The level of proficiency in gymnastic exercises shows that the exercises “Rope climbing in two steps”, “Rope climbing in three steps”, “One leg swing upward circle” are difficult for 9-year-old girls to perform. Based on the data analysis, it can be argued that the development of “arm strength” and “vestibular stability” ensures the formation of motor skills, and the improvement of their development level is the reserve in training girls aged 9 which will positively influence the formation of motor skills.

It was found that the positive effect of learning depends on the level of motor abilities development, consistent solving of learning tasks, and rational application of methods (Khudolii, 2019;Ivashchenko, 2020).
However, further research is needed to determine the leading role of motor skills development in the educational environment at primary school.
The study purpose was to determine the peculiarities of 9-year-old girls' motor fitness structure.

Study Participants
The study involved 35 9-year-old girls. The children and their parents were informed about all the features of the study and gave their consent to participate in the experiment.

Organization of the Study
The study used the following research methods: analysis of scientific and methodological literature, pedagogical observations, testing of motor fitness, probabilistic approach to assessing the learning process, methods of mathematical statistics.
The study recorded the primary schoolchildren's level of proficiency in gymnastic exercises. The coefficient was determined by the formula: p = (m/n)×100, where p is the level of proficiency, m is the number of successfully performed exercises, n is the total number of attempts to perform the exercise. In the experiment, the study controlled the level of proficiency in the following exercises: "Rope climbing in two steps", "Rope climbing in three steps", "One leg swing upward circle".

Statistical Analysis
The study materials were processed using the IBM SPSS 20 statistical analysis software. Factor analysis was performed. In the factor analysis, the study used the model of principal components with the rotation method: Varimax with Kaiser Normalization.
The study protocol was approved by the Ethical Committee of the University. In addition, the children and their parents or legal guardians were fully informed about all the features of the study, and a signed informed-consent document was obtained from all the parents. Table 1 shows the results of testing the 9-year-old girls' motor fitness.
The coefficient of variation in terms of the level of proficiency in the exercises "Rope climbing in two steps, level of proficiency" (87.5%); "Rope climbing in three steps, level of proficiency" (90.65%); "One leg swing upward circle, level of proficiency" (93.23%) shows that the exercises are difficult to perform. Thus, the level of fitness of the 9-year-old girls is homogeneous by the development of "agility" and "movement coordination", inhomogeneous -by the development of flexibility, arm strength, vestibular stability, and the level of proficiency in gymnastic exercises. Table 2 shows the results of factor analysis. The analysis identified five factors that explain 74.773% of the variation of results.
The first factor has a weight of 28.394%. With the factor, the greatest correlation is in the level of proficiency in exercises: No. 12 "Rope climbing in two steps, level of proficiency" (r = 0.983); No. 13 "Rope climbing in three steps, level of proficiency" (r = 0.984); No.14 "One leg swing upward circle, level of proficiency" (r = 0.987). The factor is called the level of proficiency in gymnastic exercises.
The third factor has a weight of 11.567%. With the factor, the greatest correlation is in: No. 5 "30 m running from a standing start, s" (r = 0.833); No. 4 "300 m running, s" (r = 0.722); No. 10 "Maintenance of stable posture -standing on one leg with closed eyes, s" (r = 0.438). The factor is called the level of general physical fitness.
The fourth factor has a weight of 10.608%. With the factor, the greatest correlation is in: No. 3 "Standing long jump, cm" (r = 0.731); No. 11 "Walking along straight line after 5 rotations, deviations in cm" (r = -0.694); No. 10 "Maintenance of stable posture -standing on one leg with closed eyes, s" (r = 0.482). The factor is called vestibular stability.
The fifth factor has a weight of 8.858%. With the factor, the greatest correlation is in tests: No. 9 "Combined movements of arms, torso and legs, points" (r = 0.820); No. 6 "Seated forward bend, cm" (r = -0.599). The factor is called movement coordination. The analysis of similarities made it possible to identify the most informative indicators that determine the level of motor fitness of the 9-year-old girls: • No. 12 "Rope climbing in two steps, level of proficiency" (r = 0.972); • No. 13 "Rope climbing in three steps, level of proficiency" (r = 0.978); • No. 14 "One leg swing upward circle, level of proficiency" (r = 0.978); • No. 7 "Mixed hang rope pull-ups, times" (r = 0.858).
The graphic representation of a two-factor model of testing results shows that the analysis identifies two sets of data with high correlation coefficients. The first set includes tests No. 12, 13, 14, and 7, which characterize the level of proficiency in gymnastic exercises and relative arm strength; the second -tests No. 1, 10, and 5, which characterize the level of movement coordination development (see Fig. 1).
Thus, the motor fitness of 9-year-old girls is determined by the level of development of arm strength, vestibular stability, and the level of proficiency in gymnastic exercises.

Discussion
The paper assumed that motor skills occupy a prominent place in the structure of motor fitness of 9-year-old girls. So, the level of proficiency in exercises determines the variation of testing results by 28.394%. Thus, the study's findings make it possible to accept the research hypothesis on the leading role of motor skills development in the educational process at primary school.
The analysis of the coefficients of variation points to heterochrony in the development of the 9-year-old girls' motor abilities. The level of proficiency in gymnastic exercises indicates that the exercises are impossible for 9-year-old girls to perform. Based on the data analysis, it can be argued that the development of "arm strength" and "vestibular stability" ensures the formation of motor skills, and the improvement of their development level is the reserve in training girls aged 9 which will positively influence the educational process effectiveness.
Thus, the motor fitness of 9-year-old girls is determined by the level of development of arm strength, vestibular stability, and the level of proficiency in gymnastic exercises.

Conclusions
Based on factor analysis, it was found that the level of proficiency in exercises determines the variation of testing results by 28.394%, and the development of motor skills is a priority in the educational process at primary school.
The level of proficiency in gymnastic exercises shows that the exercises "Rope climbing in two steps", "Rope climbing in three steps", "One leg swing upward circle" are difficult for 9-year-old girls to perform. Based on the data analysis, it can be argued that the development of "arm strength" and "vestibular stability" ensures the formation of motor skills, and the improvement of their development level is the reserve in training girls aged 9 which will positively influence the formation of motor skills.