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<article article-type="review-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">vmireaviz</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник медицинского института «РЕАВИЗ». Реабилитация, Врач и Здоровье</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of the Medical Institute "REAVIZ" (REHABILITATION, DOCTOR AND HEALTH)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-762X</issn><issn pub-type="epub">2782-1579</issn><publisher><publisher-name>РЕАВИЗ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20340/vmi-rvz.2023.6.PHYS.1</article-id><article-id custom-type="elpub" pub-id-type="custom">vmireaviz-802</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>Физиология</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Physiology</subject></subj-group></article-categories><title-group><article-title>Динамика стресс-индекса и спектральных показателей кардиоинтервалограммы элитных лыжников-гонщиков в подготовительном, соревновательном и переходном периодах в зависимости от объёма и интенсивности тренировочных нагрузок</article-title><trans-title-group xml:lang="en"><trans-title>Dynamics of stress-index and spectral indicators of cardiointervalogram of elite skiers-racers in the preparatory, competition and transition periods depending on the volume and intensity of training loads</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8051-3521</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Катаев</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kataev</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Катаев Денис Анатольевич - Мастер спорта России по лыжным гонкам, помощник старшего тренера, Федерации лыжных гонок Республики Татарстан; аспирант кафедры биологии и методики обучения биологии, Вятский ГУ.</p><p>Ул. Московская, д. 36, Киров, 610000; ул. Чернышевского, д. 26/25, Казань, 420111</p></bio><bio xml:lang="en"><p>Denis A. Kataev - Master of Sports of Russia in cross-country skiing, assistant coach, Federation of ski racing of the Republic of Tatarstan; postgraduate student of the Department of Biology and Methods of Teaching Biology, Vyatka SU.</p><p>36, Moskovskaya str., Kirov, 610000; 26/25, Chernyshevsky str., Kazan, 420111</p></bio><email xlink:type="simple">den.cataev2014@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3467-3919</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Циркин</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsirkin</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Циркин Виктор Иванович - Д-р мед. наук, профессор, старший научный сотрудник института нейронаук.</p><p>Ул. Бутлерова, д. 49, г. Казань, 420012</p></bio><bio xml:lang="en"><p>Viktor I. Tsirkin - Dr. Sci. (Med.), Professor, Senior Researcher, Institute of Neurosciences.</p><p>49, Butlerova str., Kazan, 420012</p></bio><email xlink:type="simple">esbartsirkin@list.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7259-7078</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Трухин</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Trukhin</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Трухин Андрей Николаевич - Канд. биол. наук, доцент, доцент кафедры биологии и методики обучения биологии.</p><p>Ул. Московская, д. 36, г. Киров, 610000</p></bio><bio xml:lang="en"><p>Andrey N. Trukhin - Cand. Sci. (Biol.), Associate Professor, Associate Professor of the Department of Biology and Methods of Teaching Biology.</p><p>36, Moskovskaya str., Kirov, 610000</p></bio><email xlink:type="simple">trukhinandrey@rambler.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3888-1993</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Трухина</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Trukhina</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Трухина Светлана Ивановна - Канд. биол. наук, доцент, доцент кафедры биологии и методики обучения биологии.</p><p>Ул. Московская, д. 36, г. Киров, 610000</p></bio><bio xml:lang="en"><p>Svetlana I. Trukhina - Cand. Sci. (Biol.), Associate Professor, Associate Professor of the Department of Biology and Methods of Teaching Biology.</p><p>36, Moskovskaya str., Kirov, 610000</p></bio><email xlink:type="simple">trukhinasvetlana@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Вятский государственный университет; Федерация лыжных гонок Республики Татарстан</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Vyatka State University; Federation of cross-country skiing of the Republic of Tatarstan</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Казанский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Вятский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Vyatka State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>13</day><month>01</month><year>2024</year></pub-date><volume>13</volume><issue>6</issue><fpage>12</fpage><lpage>25</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Катаев Д.А., Циркин В.И., Трухин А.Н., Трухина С.И., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Катаев Д.А., Циркин В.И., Трухин А.Н., Трухина С.И.</copyright-holder><copyright-holder xml:lang="en">Kataev D.A., Tsirkin V.I., Trukhin A.N., Trukhina S.I.</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://vestnik.reaviz.ru/jour/article/view/802">https://vestnik.reaviz.ru/jour/article/view/802</self-uri><abstract><sec><title>Акутальность</title><p>Акутальность. Вариабельность сердечного ритма, позволяет дать оценку состояния автономной нервной системы, что полезно для исследования состояния спортсменов, в том числе тренирующихся на выносливость, например, лыжников-гонщиков. Показатель стресс-индекса часто используется для оценки влияния стресса на человека. Показано, что стресс-индекс тесно коррелирует с интенсивностью метаболизма и с показателями энерготрат организма.</p></sec><sec><title>Цель</title><p>Цель: представить данные исследований о корреляции величин стресс-индекса у спортсменов с рядом факторов, в том числе от его спортивной специализации, от объёма и интенсивности тренировочной нагрузки в течение подготовительного, соревновательного, переходного периодов лыжного сезона.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Произведен анализ литературы в базе данных Pubmed за последние 10 лет на английском, русском языках.</p></sec><sec><title>Заключение</title><p>Заключение. Обзор литературы в отношении величины стресс-индекса показал, что у спортсменов, тренирующихся на выносливость, данный показатель низкий, особенно у лыжников-гонщиков, если его сравнивать с величиной индекса у представителей других видов спорта, а также со здоровыми людьми, не занимающимися спортом. В зарубежной литературе сведений о значении показателя стресс-индекса у спортсменов не встречается, но в отечественной литературе такие сведения есть, что и позволило представить данный обзор, который также включает и результаты наших исследований.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Acutality</title><p>Acutality: Heart rate variability, allows you to assess the state of the autonomic nervous system, which is useful for studying the condition of athletes, including endurance athletes, for example, ski racers. The stress index indicator is often used to assess the impact of stress on a person. It is shown that the stress index is closely correlated with the intensity of metabolism and with the indicators of energy consumption of the body.</p></sec><sec><title>Objective</title><p>Objective. To provide information on the values of the stress index for athletes depending on a number of factors, including their sports specialization, and for ski racers on the volume and intensity of the training load during the preparatory, competitive, transitional periods of the ski season.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The literature analysis in the Pubmed database for the last 10 years in English and Russian languages has been carried out.</p></sec><sec><title>Conclusion</title><p>Conclusion. A review of the literature on the magnitude of the stress index showed that athletes who train for endurance, this indicator is low, especially among ski racers, if it is compared with the magnitude of the index in representatives of other sports, as well as with healthy people who do not play sports. There is no information about the value of the stress index in athletes in foreign literature, but there is such information in the domestic literature, which allowed us to present this review, which also includes the results of our research.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>лыжники-гонщики</kwd><kwd>объём и интенсивность тренировок</kwd><kwd>периоды годичного цикла</kwd><kwd>вариабельность сердечного ритма</kwd><kwd>стресс-индекс</kwd><kwd>спектральные показатели</kwd><kwd>антиапоптическая система</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cross-country skiers</kwd><kwd>training volume and intensity</kwd><kwd>annual cycle periods</kwd><kwd>heart rate variability</kwd><kwd>stress-index</kwd><kwd>spectral parameters</kwd><kwd>anti-apoptotic system</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование проводилось без спонсорской поддержки</funding-statement><funding-statement xml:lang="en">This research received no external funding</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Гаврилова Е.А. 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