Indicators of heart rhythm variability as informative markers of adaptive changes in Mixed Martial Arts

Abstract

This article presents the results of a study of determining the characteristics of changes in heart rate variability indicators in athletes who have been engaged in horting, hand-to-hand combat, and Thai boxing for a long time in response to strength loads in pre-competition mesocycles. It was established that in the examined athletes, regardless of the type of mixed martial arts, the tension of all regulatory systems was fixed before the beginning of strength loads, as indicated by the parameters of the VLF indicator, which were almost twice the norm. At the same time, it was established that the HF indicator of the participants, which characterizes the parasympathetic tone, is on average only 10.3% of the total power of the spectrum, which indicates the predominance of the sympathetic system. The results revealed after the participants used power loads of a large amount of loads and medium intensity indicate a reliable decrease in the total power of the spectrum of oscillation of cardio intervals. An increase in the intensity of the autonomic regulation of the heart rhythm due to the weakening of the activation of the parasympathetic tone was revealed, primarily in athletes engaged in horting. It is in athletes from hand-to-hand combat and horting, in response to power loads with a large volume of work, the activation of the central circuit increases and the level of sympathetic regulation increases.