Introduction. A large volume and intensity of physical activity, without which at the present stage the system of training female athletes is indispensable, leads to significant changes in the functional systems of the body of women. In addition to the impact of loads in training and competitive activities, the organism of female athletes of reproductive age is influenced by hormonal changes during OMC, which affects the well-being, working capacity, psycho-emotional stress and other parameters of the physical condition of women, which ultimately affects the competitive result. However, there is no information regarding the dynamics of cardiointervalometry indicators, the functional state in different phases of the OMC of female athletes specializing in Thai boxing. The purpose of the study was to determine the indicators of cardioin-tervalometry of athletes specializing in Thai boxing in different phases of the ovarian-menstrual cycle. Methodology and organization of the study. A non-invasive method - cardiointervalometry - is widely used to control the functional states of athletes. Using this method, we determined the spectral, statistical and temporal parameters of heart rate variability during five phases of the OMC of female athletes specializing in Thai boxing under several conditions, namely: in a state of relative rest, after performing a standard physical load (a special 3-minute test), during the recovery period (for 10 minutes). Results of the study and their discussion. An analysis of the statistical, temporal and spectral indicators of heart rate variability among athletes specializing in Muay Thai, in a state of relative rest, showed that in the ovulatory phase of the OMC there is a slight increase in the degree of tension of the regulatory systems, a significant increase in the degree of tension of the regulatory systems in the menstrual and especially in the premenstrual phase. OMC compared with postmenstrual and postovulatory phases of OMC. Thus, the obtained research data and conclusions on them make it possible to rationally organize the educational and training process of athletes specializing in Thai boxing, planning a load of different volume and intensity, taking into account the functioning of the cardiovascular and autonomic nervous systems throughout the OMC. In the menstrual, ovulatory and premenstrual phases after physical activity, metabolic and humoral effects on the regulation of the heart rhythm activity of athletes are noted. After performing physical activity, pronounced sympathotonia is noted throughout the OMC, however, higher LF/HF values were detected in the menstrual and premenstrual phases, which significantly differs from this parameter in the postmenstrual, ovulatory, and postovulatory phases of the OMC. During the recovery period after performing a standard physical activity in the postmenstrual and postovulatory phases of OMC, sympathotonia predominates in athletes, however, it is of a moderate nature, in which the LF / HF parameter is significantly reduced, which is statistically significantly lower than in the menstrual, ovulatory, and especially premenstrual phases OMC, where pronounced sympathotonia remains (p<0.05). Conclusions. The highest level of tension of regulatory systems, slowdown in recovery processes, an increase in the metabolic and humoral influence on the regulation of the heart rhythm, the predominance of the sympathotonic type of autonomic regulation, as well as high values of the indicator of activity of the body's regulatory systems, which indicate the consumption of functional reserves for the normal functioning of the body, arise as a result of stress, pronounced fatigue, psycho-emotional stress are typical for menstrual and premenstrual, to a lesser extent for the ovulatory phases of OMC. The obtained scientific data should be taken into account when planning the mesocycles of training of athletes specializing in Thai boxing in order to increase the effectiveness of the training process and reduce the risk of pathologies of the female reproductive system.
CARDIOINTERVALOMETRY, OVARIAN-MENSTRUAL CYCLE, FUNCTIONAL STATE, THAI BOXING
1. Baevskiy R.M. Analiz variabel'nosti serdechnogo ritma: istoriya i filosofiya, teoriya i praktika / R.M. Baevskiy // Klinicheskaya informatika i telemedicina. - 2004. - № 1 (1). - S. 54-64.
2. Grec I.A. Rekordnye sportivnye dostizheniya zhenschin v aspekte polovogo dimorfizma: avtoref. dis.. d-ra ped. nauk / Grec Irina Antonovna. - Sankt-Peterburg, 2012. - 61 s. EDN: https://elibrary.ru/QHZTYX
3. Ivanov A.V. Podgotovka dzyudoistok na osnove individual'nogo ucheta ciklicheskih izmeneniy rabotosposobnosti: avtoref. dis.. kand. ped. nauk / Ivanov Andrey Vasil'evich. -Sankt-Peterburg, 1994. - 21 s. EDN: https://elibrary.ru/ZKVIDR
4. Svechnikova N.V. Medikobiologicheskie aspekty izucheniya sovremennogo zhenskogo sporta / N.V. Svechnikova, Yu.T. Poholenchuk //Sport v sovremennom obschestve: Pedagogika, psihologiya: tez. dokl. Vsemirnogo nauchnogo kongressa (Tbilisi, iyul' 1980 g.). - S. 23.
5. Tarakanov B.I. Prioritetnye nauchnye napravleniya sovershenstvovaniya sistemy podgotovki zhenschin, zanimayuschihsya sportivnoy bor'boy // B.I. Tarakanov, N.Yu. Nerobeev / Uchenye zapiski universiteta im. P.F. Lesgafta. - 2009. - №. 9. - S. 93-96. EDN: https://elibrary.ru/KXLZTL
6. Cherkashina E.V. Model'nye pokazateli variabel'nosti serdechnogo ritma begunov na srednie distancii / E.V. Cherkashina, A.Yu. Petrova, Ya.I. Savvinova // Uchenye zapiski universiteta im. P.F. Lesgafta. - 2019. - № 11 (177). - S. 440-444. EDN: https://elibrary.ru/FLVADT
7. Shahlina L.G. Mediko-biologicheskie osnovy sportivnoy podgotovki zhenschin v sovremennom sporte vysshih dostizheniy / L.G. Shahlina // Teoriya i metodika fizicheskogo vospitaniya i sportu. - 2020. - № 2. - S. 95-104.
