Eurasian Journal of Sport Science

Eurasian Journal of Sport Science


Purpose: Assessment of cardiovascular response of qualified middle-distance runners to aerobic and anaerobic physical loads.

Methods: Qualified middle-distance runners at the stage of sportsmanship improvement (n = 20) were studied. Sports qualification - 2 and 1 categories. The analysis of Heart Rate Variability was carried out using the application “CardioMood” with “Polar h10” and “Polar M430”. A 5-minute electrocardiogram recording was performed. Only normal NN cardio cycles were studied. When analyzing Heart Rate Variability, the following parameters were obtained: HR, SDNN, pNN50, TP, entropy (H), modes (Mo), AMo, stress index. The complex “vegetative indicator” was calculated. Statistical processing of obtained research results was carried out by "EXCEL" program. In random samples of study, the following were calculated: arithmetic mean (M±), standard deviation (±a). Normality of distribution was determined by statistical test. The significance of the differences between indicators was determined using the Student's t-test (assuming a normal distribution). Correlation analysis was performed using the simple correlation method.

Results: Athletes Heart Rate and Heart Rate Variability indicators are significantly differed, Heart Rate mechanism regulation was characterized by restructuring to an autonomous regulation loop, activity indicator is respiratory sinus arrhythmia with minimal centralization of control and an increase to parasympathetic nerve system. This was reflected in SDNN indicators characterizing the “scatter function” of cardio intervals durations. The shift of vegetative balance towards parasympathetic, and AMo value, less than 30%, is due to an excess of adaptation resources.

Conclusion: The results showed that nowadays, while building an effective training program, it is necessary to use modern technologies for correction and operational control of training process, as well as rational distribution of the volume and intensity of loads in preparatory period. The data of the research work can be useful for both: specialists in middle-distance running, and for athletes involved in other sports that are similar in performing of physical work.

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