For the first time, the structure and content of the technology for prevention of violations of biomechanical properties of the feet of children of primary school age with hearing deprivation in the process of adaptive physical education were theoretically substantiated and developed; for the first time, the peculiarities of the support-spring properties of the foot (metatarsal angle alpha, heel angle beta, and angle gamma) of 6-8 years old children were discovered, depending on the type of body structure and the presence of hearing deprivation; for the first time, an assessment of the correlation between the body type and the longitudinal dimensions of their bodies was carried out (analysis of the differences between the longitudinal dimensions of the bodies of practically healthy boys 6-8 years old showed that, depending on the somatotype, groups of children differ statistically in terms of the length of the body, trunk, forearm, hand, as well as the length of the lower leg); data on the development of the skeleton, muscles and fat deposits of healthy 6-8 years old children are added; scientific data on indicators of longitudinal dimensions of the body are added; ideas of the peculiarities of the physical development of 6-8 years old children acquired a further development; the theory of "artificial control environment" in the system of adaptive physical education got further development.
Clustering of the longitudinal body dimensions of children aged 6-8 years was carried out by the K-means method with preliminary standardization of the initial data using the method of sorting the distances between all objects with the subsequent selection of observations at constant intervals as the initial centers of clusters. Clustering made it possible to establish the peculiarities of the development of individual indicators according to the body type and taking into account gender and the presence of hearing deprivation.
Scientific provisions on the problem of deprivations of the biomechanical characteristics of the foot, 6-8 years old children with defects of the sensory system and solving the problem of increasing the effectiveness of the process of adaptive physical education by means of searching the most effective organizational and methodological approaches to the lessons of physical culture for schoolchildren with hearing deprivation, integrationin their content the latest technologies were analyzed and summarized.
The relation of such features as the shape of the back, chest, abdomen, legs, as well as the degree of development of the skeleton and fat and muscle tissues of children were studied. In girls with derivation of hearing, a trend similar to that of boys was observed, which was manifested in the absence of probable differences between the indicators of adjacent age groups and in the presence of probable discrepancies between the indicators of girls of the same age with hearing deprivation and healthy ones. The distribution of 6-8-year-old children by body type is as follows: among boys, regardless of the presence of derivation, a somewhat larger share of children is muscular, and among girls - digestive type. At the same time, among children with hearing deprivation there is an insignificantly larger share with the thoracic type. The maximum share of children with thoracic type was found in girls with hearing deprivation. The greatest number of children of the muscular type and the least one of the digestive type were found among healthy boys, and children of the asthenoid type were approximately the same in all groups of the examined.
The technology solves corrective and developing tasks, namely, the development of fine motor skills of the hands, the formation of consistency in the work of hands and feet; formation of the ability to walk straight without lowering the head, ability to maintain balance and direction of the body while walking and running, formation of correct posture, prevention of violations of foot biomechanics. In mobile games - manifestation of emotionality and development of quick reaction to sound signals, improvement of orientation in space and time.
The practical significance is that the results of the dissertation can be used in the educational process while training specialists in adaptive physical education as well as in work of primary school teachers of special general educational institutions for children with hearing impairments.
