Abstract
The objective of the research was to study the expediency of heart rate variability indices use in terms of active orthostasis as adaptative reserve assessment.
Materials and methods. The study involved students at the age of 17-19 with different levels of physical fitness. The girls of the main group were engaged in physical exercises only during physical education classes. The girls of the control group had been engaged in aerobics and jogging for 2-3 years already. The heart rate variability under the conditions of active orthostatic test and exercise tolerance was evaluated.
Results of the research. Moderate activation of sympathetic-adrenal system
on the background of reduced exercise tolerance was observed in the girls of the main group. It was indicated by increase in index of strain by 22.7 %, LF and LF/HF indices on the background of cholinergic (HF) system tonus reduction. The changes indicated excessive cerebral ergotropic impact on lower regulatory structure under the conditions of active orthostasis in girls with low physical activity. Index of higher autonomic centers activity that is the index of centralization was 53.64 % higher than initial results under the conditions of active orthostasis in girls of the main group. Such fact was not observed in the girls of the control group indicating to the advantage of central boundary over the autonomous one. The results can serve as a marker of disadaptation syndrome in adolescence.
Conclusions. Heart rate variability analysis in terms of orthostasis can be recommended to determine the condition of adaptation reserves in young people.
References
Atakhanov Sh., Robertson D. Orthostatic hypotension and autonomic failure (mechanisms and classification). Kardiologiya. 1995; 3: 41–50.
Baevskiy R. M. Analysis of heart rate variability: the history and philosophy, theory and practice. Klinicheskaya informatika i telemeditsina. 2004; 1: 54–64.
Veyn A. M. Autonomic dysfunction: clinical findings, diagnosis, treatment. Moscow. OOO “Meditsinskoe informatsionnoe agenstvo”. 2003; 752.
Mamiy V. I., Haspekova N. B. About the nature of very low-frequency component of heart rate variability and the role of the sympathetic-parasympathetic interaction. Ross. fiziologich. zh. im. I. M. Sechenova. 2002; 2: 237–247.
Popov V. V., Fritsshe L. N. Heart rate variability: the ability to use in physiology and clinical medicine. Ukraiinskyi medychnyi chasopys. 2006; 2 (52): 1–8.
Prekina V. I., Samolkina O. G. Heart rate variability and circadian index in acute ischemic stroke in the dynamics. Fundamentalnyie issledovaniya. 2013; 7-1: 149–153.
Farina B., Colicchio S., Testani E. Heart Rate and Heart Rate Variability Modification in Chronic Insomnia Patients. Behavioral Sleep Medicine. 2014;12(4): 290-306.
Lombardi F. Sudden cardiac death: role of heart rate variability to identify patients at risk. Cardiovascular Research. 2001; 50: 210–217.
Parati G., Saul G. P., Di Rienzo M..Spectral analyses of blood pressure and heart rate variability in evaluating cardiovascular regulation. A critical appraisal. Hypertension. 1995; 25: 1276-1286.
Schwartz R.J. The neural control of heart rate and risk stratification after myocardial infarction. Eur. Heart J. 1999; 1 (Suppl H): 13-15.
Sztajzel J. Heart rate variability: a noninvasive electrocardiographic method to measure the autonomic nervous system. Swiss. Med. Wkly. 2004; 134: 514–522.
Verlinde D., Beckers F., Ramaekers D.. Wavelet deposition analyses of heart rate variability in aerobic athletes. Autonomic Neuroscience: Basic and Clinical. 2001; 90: 134-141.
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