<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mchsros</journal-id><journal-title-group><journal-title xml:lang="ru">Медико-биологические и социально-психологические проблемы безопасности в чрезвычайных ситуациях</journal-title><trans-title-group xml:lang="en"><trans-title>Medicо-Biological and Socio-Psychological Problems of Safety in Emergency Situations</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1995-4441</issn><issn pub-type="epub">2541-7487</issn><publisher><publisher-name>«The Nikiforov Russian Center of Emergency and Radiation Medicine»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25016/2541-7487-20250-0-4-87-96</article-id><article-id custom-type="elpub" pub-id-type="custom">mchsros-1194</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>БИОЛОГИЧЕСКИЕ ПРОБЛЕМЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOLOGICAL ISSUES</subject></subj-group></article-categories><title-group><article-title>Сердечно-сосудистые эффекты кардиобиоуправления у индийских и русских студентов при обучении в условиях Арктической зоны России</article-title><trans-title-group xml:lang="en"><trans-title>Cardiovascular effects of cardiac biofeedback training in Indian and Russian students studying in the Russian Arctic</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7912-9226</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дёмин</surname><given-names>Д. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Demin</surname><given-names>D. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Денис Борисович Дёмин, д-р мед. наук, ст. науч. сотр.</p><p>лаб. биоритмологии</p><p>163000; пр. Ломоносова, д. 249; Архангельск</p></bio><bio xml:lang="en"><p>Denis Borisovich Demin, Dr. Med. Sci., Senior staff scientist</p><p>Biorhythmology Laboratory</p><p>163000; 249, Lomonosov Ave.; Arkhangelsk</p></bio><email xlink:type="simple">denisdemin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный исследовательский центр комплексного изучения Арктики им. акад. Н.П. Лаверова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>01</day><month>02</month><year>2026</year></pub-date><volume>0</volume><issue>4</issue><fpage>87</fpage><lpage>96</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дёмин Д.Б., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Дёмин Д.Б.</copyright-holder><copyright-holder xml:lang="en">Demin D.B.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://mchsros.elpub.ru/jour/article/view/1194">https://mchsros.elpub.ru/jour/article/view/1194</self-uri><abstract><sec><title>   Актуальность</title><p>   Актуальность. Первый год обучения в университете требует психофизиологической адаптации, особенно у иностранных студентов, сталкивающихся с дополнительными стрессорами, такими как культурный шок и языковой барьер. В условиях арктических широт адаптационный стресс у студентов из тропиков проявляется через вегетативные и сердечно-сосудистые нарушения. Перспективным немедикаментозным методом коррекции дезадаптивных стрессовых состояний является стимуляция парасимпатической нервной системы с использованием принципов биологической обратной связи.</p><p>   Цель – сравнительный анализ динамики показателей сердечно-сосудистой системы у индийских и русских студентов в Арктике при использовании кардиобиоуправления с учетом исходных особенностей их вегетативной регуляции.</p></sec><sec><title>   Методология</title><p>   Методология. Обследованы 40 индийских и 40 русских студентов университета Арктической зоны России, мужчин в возрасте 19–21 года. Определяли параметры вариабельности сердечного ритма и артериальное давление (АД). Исходя из фоновых показателей вариабельности сердечного ритма, студенты обеих национальностей были разделены на группы с ваготоническим, нормотоническим, симпатикотоническим типами регуляции. Обследуемым студентам проводили сеанс биоуправления, повышающего резервы парасимпатической регуляции ритма сердца.</p><p>   Результаты и их анализ. В выборках индийских / русских студентов выявлено 15 / 30 % с ваготонией, 45 / 50 % – с нормотонией, 40 / 20 % – с симпатотонией. Значимо более высокая фоновая активность симпатико-адреналовой системы (повышенные частота сердечных сокращений, Stress Index и АД) выявлена у индийцев с симпатикотонией в сравнении с русскими. Сеанс кардиобиоуправления был эффективен для всех обследуемых лиц, наиболее выраженные изменения параметров вариабельности сердечного ритма отмечались у индийских студентов с симпатикотонией при достаточной устойчивости у них показателей АД и барорецепторной стабильности. У русских студентов с симпатикотоническим типом кардиобиоуправление сопровождалось более выраженным снижением АД и активацией барорефлекторных механизмов.</p></sec><sec><title>   Заключение</title><p>   Заключение. Функциональное напряжение регуляторных систем и повышенная симпатическая активация могут быть типичными для студентов-мигрантов из Индии, тогда как у потомков постоянных жителей Арктической зоны России, вероятно, сформировались генетически детерминированные механизмы адаптации кардиоваскулярной системы к сложным условиям длительного проживания на Севере. Полученные результаты подчеркивают важность проведения продолжительных и многократных сеансов кардиобиоуправления для студентов, прибывающих на Север из тропических регионов, для ускорения их адаптации к суровым условиям.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>   Relevance</title><p>   Relevance. Over the first year of studies, university students have to undergo psychological and physical adaptation, which is especially the case in international students facing additional stress factors, such as culture shock and language barriers. Adaptation stress in students who come from tropical region to study in the Arctic region of Russia is manifested through autonomic and cardiovascular disorders. Parasympathetic nervous system stimulation engaging biofeedback training is a promising non-pharmacological correction of maladaptive stress.</p><p>   The study aim is to use cardiac biofeedback training to compare cardiovascular dynamics in Indian and Russian students staying in the Arctic taking into account their baseline characteristics of the autonomic nervous system.</p></sec><sec><title>   Methods</title><p>   Methods. 40 Indian and 40 Russian male university students, aged 19–21 years, living in the Russian Arctic were examined. Heart rate variability (HRV) and blood pressure (BP) parameters were measured. Based on the baseline HRV, Indian and Russian students were split into groups for vagotonia, normotonia, or sympathotonia. All subjects had one biofeedback session aimed at improving the parasympathetic heart rhythm regulation.</p><p>   Results and discussion. Indian and Russian students were split across the groups showing the following ratio: 15 % Indians and 30 % of Russians were vagotonic; 45 % of Indians and 50 % of Russians were normotonic; and 40 % and 20 % respectively were sympathotonic. In the latter group, the Indian students showed significantly higher background activity rates in their sympathetic system (increased HR, Stress Index and BP) than their Russian fellows. The session of cardiac biofeedback was effective for all subjects, with the most pronounced changes in HRV parameters observed in sympathotonic Indian students with sufficient BP and baroreceptor stability. In sympathotonic Russian students, the cardiac biofeedback was accompanied by a more pronounced decrease in BP and baroreflex activation.</p></sec><sec><title>   Conclusion</title><p>   Conclusion. Functional overload of the regulatory systems and increased sympathetic activation are assumingly typical for migrant students from India, whereas the younger generation of permanent residents of the Russian Arctic seem to have genetic mechanisms of cardiovascular adaptation to the harsh conditions of the North. The results emphasise the importance of prolonged and multiply cardiac biofeedback sessions for students arriving from tropical regions to study in the Russian North, in order to help them adapt more rapidly to the harsh climate conditions.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>вегетативный тонус</kwd><kwd>вариабельность сердечного ритма</kwd><kwd>артериальное давление</kwd><kwd>биоуправление</kwd><kwd>индийские студенты</kwd><kwd>русские студенты</kwd><kwd>адаптация</kwd><kwd>Арктика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>autonomic tone</kwd><kwd>heart rate variability</kwd><kwd>blood pressure</kwd><kwd>biofeedback</kwd><kwd>Indian students</kwd><kwd>Russian students</kwd><kwd>adaptation</kwd><kwd>Arctic</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Артамонова С.Ю., Аммосова А.М., Захарова Н.М. [и др.]. Состояние вегетативной нервной системы у подростков города Якутска // Вестн. Сев.-Вост. Федер. ун-та им. М.К. Аммосова. Сер. Мед. науки. 2018. Т. 13, № 4. С. 33–38. DOI: 10.25587/SVFU.2018.4(13).20742.</mixed-citation><mixed-citation xml:lang="en">Artamonova S.Yu., Ammosova A.M., Zakharova N.M. [et al.]. Sostoyanie vegetativnoi nervnoi sistemy u podrostkov goroda Yakutska [The state of autonomic nervous system in teenagers of the city of Yakutsk]. Vestnik Severo-Vostochnogo federal’nogo universiteta imeni M.K. Ammosova. Seriya Meditsinskie nauki [Vestnik of North-Eastern Federal University. Medical Sciences]. 2018; 13(4):33–38. DOI: 10.25587/SVFU.2018.4(13).20742. (in Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Баевский Р.М., Черникова А.Г. Анализ вариабельности сердечного ритма: физиологические основы и основные методы проведения // Cardiometry. 2017. № 10. С. 66–76. DOI: 10.12710/cardiometry.2017.6676.</mixed-citation><mixed-citation xml:lang="en">Baevsky R.M., Chernikova A.G. Analiz variabel’nosti serdechnogo ritma: fiziologicheskie osnovy i osnovnye metody provedeniya [[Heart rate variability analysis: physiological foundations and main methods]. Cardiometriya [Cardiometry]. 2017; (10):66–76. DOI: 10.12710/cardiometry.2017.6676. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Кондратьева М.Н., Ишекова Н.И. Физическое состояние российских и индийских студентов, обучающихся в медицинском вузе // Экология человека. 2012. № 1. С. 23–28.</mixed-citation><mixed-citation xml:lang="en">Kondrat’eva M.N., Ishekova N.I. Fizicheskoe sostoyanie rossiiskikh i indiiskikh studentov, obuchayushchikhsya v meditsinskom vuze [Physical fitness of russian and indian students studying in medical university]. Ekologiya cheloveka [Human Ecology]. 2012; (1):23–28. (in Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Коробицына Е.В., Мелькова Л.А., Гудков А.Б. Влияние локального охлаждения кожи кисти и стопы на показатели периферической гемодинамики у юношей и девушек Европейского Севера России // Вестник Сев. (Арктич.) федер. ун-та. Сер.: Мед.-биол. науки. 2016. № 4. С. 22–29. DOI: 10.17238/issn2308-3174.2016.4.22.</mixed-citation><mixed-citation xml:lang="en">Korobitsyna E.V., Mel’kova L.A., Gudkov A.B. Vliyanie lokal’nogo okhlazhdeniya kozhi kisti i stopy na pokazateli perifericheskoi gemodinamiki u yunoshei i devushek Evropeiskogo Severa Rossii [Impact of Local Hand and Foot Skin Cooling on Peripheral Hemodynamic Parameters in Young Men and Women in the European North of Russia]. Vestnik Severnogo (Arkticheskogo) federal’nogo universiteta. Seria Mediko-biologicheskie nauki [Vestnik of Northern (Arctic) Federal University. Series Medical and Biological Sciences]. 2016; (4):22–29. DOI: 10.17238/issn2308-3174.2016.4.22. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Корчин В.И., Корчина Т.Я., Терникова Е.М. [и др.]. Влияние климатогеографических факторов Ямало-Ненецкого автономного округа на здоровье населения // Журн. мед.-биол. исслед. 2021. Т. 9, № 1. С. 77–88. DOI: 10.37482/2687-1491-Z046.</mixed-citation><mixed-citation xml:lang="en">Korchin V.I., Korchina T.Ya., Ternikova E.M. [et al.]. Vliyanie klimatogeograficheskikh faktorov Yamalo-Nenetskogo avtonomnogo okruga na zdorov’e naseleniya [Influence of climatic and geographical factors of the Yamalo-Nenets Autonomous Okrug on the health of its population (review)]. Zhurnal mediko-biologicheskikh issledovanii [Journal of Medical and Biological Research]. 2021; 9(1):77–88. DOI: 10.37482/2687-1491-Z046. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Поскотинова Л.В., Семенов Ю.Н. Способ коррекции вегетативных дисбалансов с помощью комплекса для обработки кардиоинтервалограмм и анализа вариабельности сердечного ритма «Варикард 2.51», работающего под управлением компьютерной программы ISCIM 6.1 (BUILD 2.8), с использованием биологической обратной связи : пат 2317771 Рос. Федерация. МПК A61B 5/0452; A61M 21/00, Заявка 2006110652/14, 03. 04. 2006, опубл. 27. 02. 2008, Бюл. 4.</mixed-citation><mixed-citation xml:lang="en">Poskotinova L.V., Semenov Yu.N. Sposob korrektsii vegetativnykh disbalansov s pomoshch’yu kompleksa dlya obrabotki kardiointervalogramm i analiza variabel’nosti serdechnogo ritma «Varikard 2.51», rabotayushchego pod upravleniem komp’yuternoi programmy ISCIM 6.1 (BUILD 2.8), s ispol’zovaniem biologicheskoi obratnoi svyazi [Method for correcting vegetative misbalance states with Varicard complex for processing cardiointervalograms and analyzing cardiac rhythm variability, operating under computer software program with biofeedback] : Patent 2317771 RU, MPC A61B 5/0452; A61M 21/00, Application 2006110652/14, 03. 04. 2006; publication 27. 02. 2008. Bull. 6. (in Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Смагулов Н.К., Адилбекова А.А., Гитенис Н.В. Оценка функционального напряжения организма иностранных студентов-медиков при адаптации к образовательной деятельности // Мед. труда и пром. экология. 2019. № 9. С. 755–756. DOI: 10.31089/1026-9428-2019-59-9-755-756.</mixed-citation><mixed-citation xml:lang="en">Smagulov N.K., Adilbekova A.A., Gitenis N.V. Otsenka funktsional’nogo napryazheniya organizma inostrannykh studentov-medikov pri adaptatsii k obrazovatel’noi deyatel’nosti [Evaluation of the functional tension of foreign medical student’s organisms in adapting to educational activities]. Meditsina truda i promyshlennaya ekologiya [Russian Journal of Occupational Health and Industrial Ecology]. 2019; (9):755–756. DOI: 10.31089/1026-9428-2019-59-9-755-756. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Шаренкова Л.А., Мищенко И.В., Репицкая М.Н. [и др.]. Оценка показателей центральной гемодинамики русских и индийских студентов на начальном этапе обучения в вузе на Европейском Севере // Мир науки. 2017. Т. 5, № 3. С. 1–6.</mixed-citation><mixed-citation xml:lang="en">Sharenkova L.A., Mischenko I.V., Repytskaya M.N. [et al.]. Otsenka pokazatelei tsentral’noi gemodinamiki russkikh i indiiskikh studentov na nachal’nom etape obucheniya v vuze na Evropeiskom Severe [Evaluation of the central hemodynamics indices of the Russian and Indian students at the initial stage of training at the higher-education institute on the European north]. Mir nauki. Pedagogika i psikhologiya [World of Science. Pedagogy and Psychology]. 2017; 5(3):1–6. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Bernardi L., Gabutti A., Porta C., Spicuzza L. Slow breathing reduces chemoreflex response to hypoxia and hypercapnia, and increases baroreflex sensitivity // J. Hypertens. 2001. Vol. 19, N 12. P. 2221–2229. DOI: 10.1097/00004872-200112000-00016.</mixed-citation><mixed-citation xml:lang="en">Bernardi L., Gabutti A., Porta C., Spicuzza L. Slow breathing reduces chemoreflex response to hypoxia and hypercapnia, and increases baroreflex sensitivity. J. Hypertens. 2001; 19(12):2221–2229. DOI: 10.1097/00004872-200112000-00016.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">DeBoer R.W., Karemaker J.M., Strackee J. Hemodynamic fluctuations and baroreflex sensitivity in humans: a beat-to-beat model // Am. J. Physiol. 1987. Vol. 253, N 3 Pt 2. P. H680–H689. DOI: 10.1152/ajpheart.1987.253.3.H680.</mixed-citation><mixed-citation xml:lang="en">DeBoer R.W., Karemaker J.M., Strackee J. Hemodynamic fluctuations and baroreflex sensitivity in humans: a beat-to-beat model. Am. J. Physiol. 1987; 253(3, Pt 2):H680–H689. DOI: 10.1152/ajpheart.1987.253.3.H680.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Fedotchev A.I., Parin S.B., Polevaya S.A. Neural Interfaces Based on Endogenous Body Rhythms for Optimization of the Functional State of Humans and Cognitive Rehabilitation // Neurosci Behav. Physiol. 2022. Vol. 52, N 5. P. 591–597. DOI: 10.1007/s11055-022-01278-4.</mixed-citation><mixed-citation xml:lang="en">Fedotchev A.I., Parin S.B., Polevaya S.A. Neural Interfaces Based on Endogenous Body Rhythms for Optimization of the Functional State of Humans and Cognitive Rehabilitation. Neurosci Behav. Physiol. 2022; 52(5):591–597. DOI: 10.1007/s11055-022-01278-4.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Khokhlova L.A., Andreeva E.A., Kiseleva L.G. [et al.]. Russian medical education from international students’ view point: challenges and coping strategies // Russ. J. Educ. Psychol. 2022. Vol. 13. P. 82–98. DOI: 10.12731/2658-4034-2022-13-5-82-98.</mixed-citation><mixed-citation xml:lang="en">Khokhlova L.A., Andreeva E.A., Kiseleva L.G. [et al.]. Russian medical education from international students’ view point: challenges and coping strategies. Russ. J. Educ. Psychol. 2022; (13):82–98. DOI: 10.12731/2658-4034-2022-13-5-82-98.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Lehrer P., Kaur K., Sharma A. Heart Rate Variability Biofeedback Improves Emotional and Physical Health and Performance : A Systematic Review and Meta Analysis // Appl. Psychophysiol. Biofeedback. 2020. Vol. 45, N 3. P. 109–129. DOI: 10.1007/s10484-020-09466-z.</mixed-citation><mixed-citation xml:lang="en">Lehrer P., Kaur K., Sharma A. Heart Rate Variability Biofeedback Improves Emotional and Physical Health and Performance : A Systematic Review and Meta Analysis. Appl. Psychophysiol. Biofeedback. 2020; 45(3):109–129. DOI: 10.1007/s10484-020-09466-z.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Lin G., Xiang Q., Fu X. [et al.]. Heart rate variability biofeedback decreases blood pressure in prehypertensive subjects by improving autonomic function and baroreflex // J. Altern. Complement. Med. 2012. Vol. 18, N 2. P. 143–152. DOI: 10.1089/acm.2010.0607.</mixed-citation><mixed-citation xml:lang="en">Lin G., Xiang Q., Fu X. [et al.]. Heart rate variability biofeedback decreases blood pressure in prehypertensive subjects by improving autonomic function and baroreflex. J. Altern. Complement. Med. 2012; 18(2):143–152. DOI: 10.1089/acm.2010.0607.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Moravec C.S. Biofeedback therapy in cardiovascular disease : rationale and research overview // Cleve. Clin. J. Med. 2008. Vol. 75, N 2. P. S35–S38. DOI: 10.3949/ccjm.75.suppl_2.s35.</mixed-citation><mixed-citation xml:lang="en">Moravec C.S. Biofeedback therapy in cardiovascular disease : rationale and research overview. Cleve. Clin. J. Med. 2008; 75(2):S35–S38. DOI: 10.3949/ccjm.75.suppl_2.s35.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Oikawa L.O. Characteristics of possible “Polar adaptation” by long-term wintering in antarctica observed through analysis of heart rate variability (HRV) components representing autonomic nervous system (ANS) response // J. Neurol. Sci. 2017. Vol. 381. P. 935. DOI: 10.1016/j.jns.2017.08.2631.</mixed-citation><mixed-citation xml:lang="en">Oikawa L.O. Characteristics of possible “Polar adaptation” by long-term wintering in antarctica observed through analysis of heart rate variability (HRV) components representing autonomic nervous system (ANS) response. J. Neurol. Sci. 2017; 381:935. DOI: 10.1016/j.jns.2017.08.2631.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Pokrovskii V.M., Polischuk L.V. Cardiorespiratory synchronism in estimation of regulatory and adaptive organism status // J. Integr. Neurosci. 2016. Vol. 15, N 1. P. 19–35. DOI: 10.1142/S0219635216500060.</mixed-citation><mixed-citation xml:lang="en">Pokrovskii V.M., Polischuk L.V. Cardiorespiratory synchronism in estimation of regulatory and adaptive organism status. J. Integr. Neurosci. 2016; 15(1):19–35. DOI: 10.1142/S0219635216500060.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Sakakibara M., Kaneda M., Oikawa L.O. Efficacy of Paced Breathing at the Low-frequency Peak on Heart Rate Variability and Baroreflex Sensitivity // Appl. Psychophysiol. Biofeedback. 2020. Vol. 45, N 1. P. 31–37. DOI: 10.1007/s10484-019-09453-z.</mixed-citation><mixed-citation xml:lang="en">Sakakibara M., Kaneda M., Oikawa L.O. Efficacy of Paced Breathing at the Low-frequency Peak on Heart Rate Variability and Baroreflex Sensitivity. Appl. Psychophysiol. Biofeedback. 2020; 45(1):31–37. DOI: 10.1007/s10484-019-09453-z.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Sawatzky A., Cunsolo A., Jones-Bitton A. [et al.]. Responding to Climate and Environmental Change Impacts on Human Health via Integrated Surveillance in the Circumpolar North : A Systematic Realist Review // Int. J. Environ. Res. Public Health. 2018. Vol. 15, N 12. P. 2706. DOI: 10.3390/ijerph15122706.</mixed-citation><mixed-citation xml:lang="en">Sawatzky A., Cunsolo A., Jones-Bitton A. [et al.]. Responding to Climate and Environmental Change Impacts on Human Health via Integrated Surveillance in the Circumpolar North : A Systematic Realist Review. Int. J. Environ. Res. Public Health. 2018; 15(12):2706. DOI: 10.3390/ijerph15122706.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Shaffer F., Ginsberg J.P. An Overview of Heart Rate Variability Metrics and Norms // Front. Public Health. 2017. Vol. 5. P. 258. DOI: 10.3389/fpubh.2017.00258.</mixed-citation><mixed-citation xml:lang="en">Shaffer F., Ginsberg J.P. An Overview of Heart Rate Variability Metrics and Norms // Front. Public Health. 2017; (5):258. DOI: 10.3389/fpubh.2017.00258.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Steffen P.R., Austin T., DeBarros A., Brown T. The Impact of Resonance Frequency Breathing on Measures of Heart Rate Variability, Blood Pressure, and Mood // Front. Public Health. 2017. Vol. 5. P. 222. DOI: 10.3389/fpubh.2017.00222.</mixed-citation><mixed-citation xml:lang="en">Steffen P.R., Austin T., DeBarros A., Brown T. The Impact of Resonance Frequency Breathing on Measures of Heart Rate Variability, Blood Pressure, and Mood. Front. Public Health. 2017; (5):222. DOI: 10.3389/fpubh.2017.00222.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Vaschillo E.G., Vaschillo B., Pandina R.J., Bates M.E. Resonances in the cardiovascular system caused by rhythmical muscle tension // Psychophysiology. 2011. Vol. 48, N 7. P. 927–936. DOI: 10.1111/j.1469-8986.2010.01156.x.</mixed-citation><mixed-citation xml:lang="en">Vaschillo E.G., Vaschillo B., Pandina R.J., Bates M.E. Resonances in the cardiovascular system caused by rhythmical muscle tension. Psychophysiology. 2011; 48(7):927–936. DOI: 10.1111/j.1469-8986.2010.01156.x.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
