For the first time in clinical conditions a study was carried out for estimation of average amplitude (AA-EMG) and frequency of oscillations repetitions parameters during dynamic and static exercises performance. We found that in healthy individuals EMG amplitude depends on the character of physical exercises performed. The largest EMG amplitude was registered when performing static exercises. It was found that in acute stroke patients, while performing flexion and extension of fingers, low-amplitude EMG activity was registered stretched for entire movement cycle without a clear peak of extremum. When performing static exercises, the amplitude and frequency of EMG oscillations changed significantly in a positive way.

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For the first time, studies have been conducted to study the reaction of animal heart rate to various modes of motor activity after a traumatic brain injury. It was revealed that on the first day after modeling an open head injury in rats of all age groups, a pronounced increase in heart rate was observed. In this case, the smallest heart rate response to brain injury is observed in animals of immature age. It was found that the implementation of systematic dynamic exercises by animals of mature and preschool age after modeling a craniocerebral injury contributes to a significant decrease in heart rate. A more pronounced formation of training bradycardia is observed in immature animals. It was revealed that limiting motor activity and performing isometric exercises after a traumatic brain injury maintain heart rate at an increased level in all age groups of animals and significantly inhibits the natural, age-related decrease in heart rate in immature animals.

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Objective: Studies were carried out to study the peculiarities of the pumping function of the heart of immature rats subjected to various regimes of motor activity at earlier stages of individual development. Methodology: White mongrel laboratory rats were used in the experiments, which were conditionally divided into two experimental test subgroups, and were subjected to forced muscle training-swimming and normal vivarium conditions, and parameters of the heart pumping function were recorded at 14, 42, and 70 days. Results and Discussion: The carried out studies allow to draw the conclusion that the heart rate (HR) and the shock volume of blood (SVB) among the animals kept in the regime of free motor activity (FrMA) from 14 to 70 days of age will largely change from 42 to 70 days of life. With a systematic muscular training, organized at earlier stages of postnatal development of rats, the pumping function of the heart and the mechanisms of its regulation undergo significant changes at the initial stage, i.е., from 14 to 42 days. Conclusions: The HR, the SVB, and the mechanisms of their regulation of small laboratory animals kept in the regime of FrMA will change to a greater extent in the age range from 42 to 70 days of life, and among the rats, susceptible to systematic muscle training, the parameters of heart pumping function and the mechanisms of its regulation undergo significant changes from 14 to 42 days of animals life.