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<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">smjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Спортивная медицина: наука и практика</journal-title><trans-title-group xml:lang="en"><trans-title>Sports medicine: research and practice</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-2524</issn><issn pub-type="epub">2587-9014</issn><publisher><publisher-name>NEICON</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">smjournal-87</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 И БИОХИМИЯ СПОРТА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SPORTS PHYSIOLOGY AND BIOCHEMISTRY</subject></subj-group></article-categories><title-group><article-title>Изучение связи эссенциальной альфа-линоленовой кислоты с вариабельностью сердечного ритма у лыжников-гонщиков</article-title><trans-title-group xml:lang="en"><trans-title>The relationship of the essential alpha-linolenic acid with heart rate variability in cross-country skiers</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Людинина</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyudinina</surname><given-names>A. Yu.</given-names></name></name-alternatives><email xlink:type="simple">salu_06@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Марков</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Markov</surname><given-names>A. L.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бойко</surname><given-names>Е. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Boyko</surname><given-names>E. R.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>ФГБУН Институт физиологии Коми, Научный центр Уральского отделения Российской академии наук</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>21</day><month>08</month><year>2020</year></pub-date><volume>8</volume><issue>1</issue><fpage>17</fpage><lpage>22</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Людинина А.Ю., Марков А.Л., Бойко Е.Р., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Людинина А.Ю., Марков А.Л., Бойко Е.Р.</copyright-holder><copyright-holder xml:lang="en">Lyudinina A.Y., Markov A.L., Boyko E.R.</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://www.smjournal.ru/jour/article/view/87">https://www.smjournal.ru/jour/article/view/87</self-uri><abstract><p>Цель исследования: изучить связь между параметрами вариабельности сердечного ритма (ВСР) и уровнем альфа-линоленовой кислоты (ЛНК) в плазме крови у высококвалифицированных лыжников-гонщиков. Материалы и методы: в общеподготовительный период тренировок обследовано 19 лыжников-гонщиков - членов сборной команды Республики Коми. С помощью аппаратно-программного комплекса «Экосан-2007» проведен анализ вариабельности сердечного ритма. Уровень ЛНК плазмы крови определен методом газовой хроматографии. Результаты: корреляционный анализ показал значимую отрицательную связь ЛНК с индексами централизации и вагосимпатического взаимодействия, абсолютными и относительными значениями мощности низкочастотных волн, а также положительную связь - с относительным значением мощности высокочастотных волн ВСР. Выводы: более низкий уровень ЛНК в плазме крови спортсменов сопряжен с появлением медленных волн более высоких порядков, свидетельствуя о неоптимальном уровне регуляции ритма сердца.</p></abstract><trans-abstract xml:lang="en"><p>Objective: to examine the correlation between heart rate variability and plasma level of alpha-linolenic acid (ALA) in cross-country skiers. Materials and methods: the short-term heart rate variability (HRV) was examined in 19 high-trained male cross-country skiers from national team of the Komi Republic. The ECG recordings were analyzed using with the Ecosan-2007 complex. ALA analysis was performed on a gas chromatograph (Chromatek, Russia). Results: the plasma levels of ALA were positively associated with the relative value of high-frequency power and negatively correlated with the indices of centralization and vagosympathetic interaction and with absolute and relative values of low-frequency power. Conclusions: a lower plasma level of ALA in athletes was associated with the appearance of slow waves of higher orders, indicating a non-optimal level of regulation of heart rhythm.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>альфа-линоленовая кислота</kwd><kwd>вариабельность сердечного ритма</kwd><kwd>выносливость</kwd><kwd>лыжники-гонщики</kwd></kwd-group><kwd-group xml:lang="en"><kwd>alpha-linolenic acid</kwd><kwd>heart rate variability</kwd><kwd>endurance</kwd><kwd>cross-country skiers</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">West S.G., Krick A.L., Klein L.C., Zhao G., Wojtowicz T.F., McGuiness M., Bagshaw D.M., Wagner P., Ceballos R.M., Holub B.J., Kris-Etherton P.M. Effects of diets high in walnuts and flax oil on hemodynamic responses to stress and vascular endothelial function // Journal of the American College of Nutrition. 2010. V.29, №6. 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