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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Medicine</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Медицина</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-0245</issn><issn publication-format="electronic">2313-0261</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">26558</article-id><article-id pub-id-type="doi">10.22363/2313-0245-2021-25-2-127-135</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL PHYSIOLOGHY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКАЯ ФИЗИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Heart rate variability analysis of students with different motor activity levels</article-title><trans-title-group xml:lang="ru"><trans-title>Анализ электрокардиограммы студентов с разным уровнем двигательной активности</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0622-8626</contrib-id><name-alternatives><name xml:lang="en"><surname>Emelyanova</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Емельянова</surname><given-names>А. С.</given-names></name></name-alternatives><email>chimik89@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5596-294X</contrib-id><name-alternatives><name xml:lang="en"><surname>Simonyan</surname><given-names>L. A.</given-names></name><name xml:lang="ru"><surname>Симонян</surname><given-names>Л. А.</given-names></name></name-alternatives><email>chimik89@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0554-6331</contrib-id><name-alternatives><name xml:lang="en"><surname>Stepura</surname><given-names>E. E.</given-names></name><name xml:lang="ru"><surname>Степура</surname><given-names>Е. Е.</given-names></name></name-alternatives><email>chimik89@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ryazan State Agrotechnological University</institution></aff><aff><institution xml:lang="ru">Рязанский государственный агротехнологический университет им. П.А. Костычева</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">State Social and Humanitarian University</institution></aff><aff><institution xml:lang="ru">Государственный социально-гуманитарный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-05-25" publication-format="electronic"><day>25</day><month>05</month><year>2021</year></pub-date><volume>25</volume><issue>2</issue><issue-title xml:lang="en">EXPERIMENTAL AND CLINICAL PHYSIOLOGY</issue-title><issue-title xml:lang="ru">ЭКСПЕРИМЕНТАЛЬНАЯ И КЛИНИЧЕСКАЯ ФИЗИОЛОГИЯ</issue-title><fpage>127</fpage><lpage>135</lpage><history><date date-type="received" iso-8601-date="2021-05-25"><day>25</day><month>05</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Emelyanova A.S., Simonyan L.A., Stepura E.E.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Емельянова А.С., Симонян Л.А., Степура Е.Е.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Emelyanova A.S., Simonyan L.A., Stepura E.E.</copyright-holder><copyright-holder xml:lang="ru">Емельянова А.С., Симонян Л.А., Степура Е.Е.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/medicine/article/view/26558">https://journals.rudn.ru/medicine/article/view/26558</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Relevance. Assessment of the functional state of the body is one of the leading tasks of physiology. The article deals with the analysis of the initial vegetative status of students with different levels of motor activity. Materials and Methods. Registration and analysis of the heart rate variability was carried out with the help of a modern complex electrophysiological laboratory «CONAN - 4.5». The heart activity of students engaged in physical culture within the educational process was evaluated on the basis of heart rate variability analysis. Results and Discussion. It was revealed that among the entire studied array of students (with the differentiation of the initial vegetative status calculated according to muscle tension index), «normotonics» are characterized by an optimal ratio between the parasympathetic and sympathetic divisions of the autonomic nervous system. At the same time, the value of the coefficient of physical activity in the studied group was determined at the level of 1.73±0.1. Conclusion. For vagotonics, the value of the triangular index was 2.5±0.2 conventional units (CU), which confirms the idea of an increase in the influence on the autonomic nervous system. The value for normotonics is 2.2±0.1 CU. This group was characterized by the balance between the sympathetic and parasympathetic parts of the autonomic nervous system. In sympathicotonics - 1.9±0.5 CU, which confirms the idea of increasing the influence of the sympathetic division of the autonomic nervous system. In hypersympathicotonics-1.1±0.4 CU. To ensure adequate functioning of the cardiovascular system and for normal adaptation to physical exertion in students, it is necessary to form a level of motor activity that quantitatively corresponds to a coefficient of physical activity of at least 1.75.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Актуальность. Оценка функционального состояния организма является одной из ведущих задач физиологии. В статье рассматривается анализ исходного вегетативного статуса студентов с разным уровнем двигательной активности. Материалы и методы. Регистрация и анализ вариабельности сердечного ритма проведен с помощью современной комплексной электрофизиологической лаборатории «CONAN - 4.5». Оценена сердечная деятельность студентов, занимающихся физической культурой в рамках образовательного процесса на основе анализа вариабельности сердечного ритма. Результаты и обсуждение. Выявлено, что среди всего изученного массива студентов (при дифференцировании исходного вегетативного статуса, рассчитанного по индексу напряжения) «нормотоники» характеризуются оптимальным соотношением между парасимпатическим и симпатическим отделами вегетативной нервной системы. При этом значение коэффициента физической активности у исследованных данной группы определялся на уровне значений 1,73±0,1. Выводы. Для ваготоников значение триангулярного индекса составляло 2,5±0,2 у. е., что подтверждает представление о повышении влияния парасимпатического отдела вегетативной нервной системы. Значение у нормотоников - 2,2±0,1 у. е. Данная группа характеризовалась равновесием между симпатическим и парасимпатическим отделами вегетативной нервной системы. У симпатикотоников - 1,9±0,5 у. е., что подтверждает представление о повышении влияния симпатического отдела вегетативной нервной системы. У гиперсимпатикотоников - 1,1±0,4 у. е. Для обеспечения адекватного функционирования сердечно-сосудистой системы и для нормальной адаптации к физическим нагрузкам у студентов необходимо формировать уровень двигательной активности, количественно соответствующий коэффициенту физической активности не ниже 1,75.</p></trans-abstract><kwd-group xml:lang="en"><kwd>electrocardiogram</kwd><kwd>cardiovascular system</kwd><kwd>stress index</kwd><kwd>initial vegetative tone</kwd><kwd>physical activity coefficient</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>электрокардиограмма</kwd><kwd>сердечно-сосудистая система</kwd><kwd>индекс напряжения</kwd><kwd>исходный вегетативный тонус</kwd><kwd>коэффициент физической активности</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Agadzhanyan NA, Baevsky RM, Berseneva AP. Problems of adaptation and the doctrine of health. Moscow. Publishing house RUDN. 2006;281-290. 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