Dr. Biol., Professor S.Yu. Zavalishina¹
PhD N.V. Vorobieva²
S.V. Krasnorutsky²
A.V. Skriplev^3
1Russian State Social University, Moscow
²Southwest State University, Kursk
³Kursk State University, Kursk

Keywords: children's age, physical culture, physical training, health, physical development.

Introduction. Regular muscle activity is a reliable guarantee of successful physical development, high vitality of the body as a whole and its systems and organs throughout ontogenesis [1]. Weak and irregular muscle activity contributes to the appearance of dysfunctions in all organs and tissues of the body, even at a very young age.
The aim of the study is to identify the main physiological parameters of children who avoid regular attendance of physical education classes at school.
Methodology and organization of the study. The observation was carried out on 29 healthy children aged 11-12 years and avoiding regular attendance of physical education classes. The control group included 26 healthy children aged 11-12 years who regularly attend school physical education classes. The children included in both groups were examined twice – at the beginning of the work and after six months of observation. During this time, all the children taken into the study led a standard lifestyle for them, maintaining the usual level of muscle activity. In all cases, the vegetative index of Kerdo, the state of the hemocirculatory system, the severity of physical development, the value of the index of the weight ratio were recorded.
The results of the study, their discussion. In children who avoided regular attendance of physical education classes, there was an increase in the weight ratio with a negative trend in the regulation of hemocirculation. In this group of children there was a tendency to activate sympathies with the formation of a tendency to its functional predominance over parasympathics with poor physical development in general.
Those who avoided physical education lessons after six months of observing them had a clear tendency to weaken their health. During the second examination in these children, the predominance of sympathetic capabilities over parasympathetic activity in the vegetative balance was revealed. With continued avoidance of regular physical activity, the weight-to-weight ratio of the examined increased by 8.4%, ensuring their transition to the category of overweight. In this group of children, the intensity of adaptation of the hemocirculation system increased by 8.2%, which led it to an unsatisfactory level.
In the children who made up the control group, the study noted the constancy of the Kerdo index with a stable balance of the severity of parasympathetic and sympathetic activity and the constancy of their normal body weight. In addition, the control group had stability of the level of adaptation of the vascular system to exercise and optimum physical development.
Conclusions. Schoolchildren aged 11-12 who avoid regular attendance of physical education classes have a high risk of dysfunction in the body. This was indicated by the development of an imbalance between the activity of the sympathetic and parasympathetic and the strengthening of anabolic processes. Also, the adaptive capabilities of the vascular system weakened in these children and a tendency to decrease the level of physical capabilities developed.

Literature

1. Medvedev I.N. Functional features of the heart in athletes / I.N. Medvedev, E.S. Kachenkova // Theory and practice of physical culture. – 2021. – No. 8. – pp. 20-21.