PECULIARITIES OF MOTOR FUNCTION OF ADULTS WHILE PERFORMING PHYSICAL EXERCISES

Abstract

Introduction. A systematic analysis of scientific and methodological sources makes it possible to state that an increase in the volume of mental work, hypodynamia, and a change in lifestyle has led to deterioration of metabolic processes in human body, as well as to occurrence of cardiovascular and nervous systems diseases, the emergence of musculoskeletal disorders, which have recently acquired signs of mass distribution. The purpose of the study is to determine peculiarities of static and dynamic stability of the body of 26–30 and 31–35-year-old men having different types of posture. Research methods include theoretical analysis and generalization of literary sources; pedagogical experiment, photography and posture analysis, stabilography, methods of mathematical statistics. The results. The results of the study make it possible to assert negative dynamics of an increased frequency of musculoskeletal system functional disorders in men aged 26–35 over the years, in particular, among those aged 26–30, scoliotic posture (30.0%) and round back (20.0%)) are observed, while among men aged 31–35 scoliotic posture (33.0%) and round back (25.0%) are characteristic. In the course of the study, we have established quantitative indicators (average range of pressure centre fluctuations, length of the trajectory of pressure centre, average speed of pressure centre movement in the sagittal and frontal planes, quality of the body balance function) of vertical stability of the body of men aged 26–30 and 31–35 years having different types of posture. The obtained data served as the basis for development of technology for improving the state of the biogeometric posture profile of men in the first period of their mature age, i.e. 26–30 years, in the process of health fitness classes. Conclusions. The primary mechanical conditions for body balance in the sagittal plane are the presence of only one axis on which oscillations unfold. The axes of movement of the ankle joints of the right and left sides coincide because they lie in the same projection. This causes significant instability of kinematic chain of the human body, which is reflected in the recorded parameters. So, normally, the deviation of gravity centre in the sagittal plane is greater compared to the frontal one. The mechanical conditions for the human body balance in the main stance in the frontal plane differ from those for the sagittal plane. Positioning the feet parallel to the width of the pelvis enables the body to swing in the frontal plane. The knee joints do not perform significant movements in this plane during the main stance of a person. It is worth noting that today there are a number of contradictions between few issues? Namely, the obvious deterioration of men’s health in the first period of their mature age and the social order for a healthy, physically developed and active adult generation; the need for a differentiated approach to the dosage of physical load according to its main parameters during the organization of health fitness classes for men aged 26–35 and, in fact, the lack of such approaches, taking into account the types of posture and the state of static and dynamic stability of the body.