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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">Ekologiya cheloveka (Human Ecology)</journal-id><journal-title-group><journal-title xml:lang="en">Ekologiya cheloveka (Human Ecology)</journal-title><trans-title-group xml:lang="ru"><trans-title>Экология человека</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1728-0869</issn><issn publication-format="electronic">2949-1444</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">321267</article-id><article-id pub-id-type="doi">10.17816/humeco321267</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL STUDY ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</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">Effect of dihydroquercetin on oxidative metabolism in young athletes engaged in winter sports in a northern region</article-title><trans-title-group xml:lang="ru"><trans-title>Корригирующее влияние дигидрокверцетина на состояние окислительного метаболизма у юношей-спортсменов зимних видов спорта в условиях северного региона</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1818-7550</contrib-id><contrib-id contrib-id-type="spin">1430-5770</contrib-id><name-alternatives><name xml:lang="en"><surname>Korchin</surname><given-names>Vladimir I.</given-names></name><name xml:lang="ru"><surname>Корчин</surname><given-names>Владимир Иванович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>д.м.н., профессор</p></bio><email>vikhmgmi@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2311-2318</contrib-id><contrib-id contrib-id-type="spin">3944-8056</contrib-id><name-alternatives><name xml:lang="en"><surname>Fedorova</surname><given-names>Elena P.</given-names></name><name xml:lang="ru"><surname>Федорова</surname><given-names>Елена Петровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>graduate student</p></bio><bio xml:lang="ru"><p>аспирант</p></bio><email>dog-elena.fedorova@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2000-4928</contrib-id><contrib-id contrib-id-type="spin">6250-6863</contrib-id><name-alternatives><name xml:lang="en"><surname>Korchina</surname><given-names>Tatyana Ya.</given-names></name><name xml:lang="ru"><surname>Корчина</surname><given-names>Татьяна Яковлевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.), professor</p></bio><bio xml:lang="ru"><p>д.м.н., профессор</p></bio><email>t.korchina@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0769-1858</contrib-id><contrib-id contrib-id-type="spin">4361-6075</contrib-id><name-alternatives><name xml:lang="en"><surname>Nehorosheva</surname><given-names>Aleksandra V.</given-names></name><name xml:lang="ru"><surname>Нехорошева</surname><given-names>Александра Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Tech.), associate professor</p></bio><bio xml:lang="ru"><p>д.т.н., доцент</p></bio><email>av.nehorosheva@hmgma.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9175-2563</contrib-id><contrib-id contrib-id-type="spin">7794-7377</contrib-id><name-alternatives><name xml:lang="en"><surname>Nehoroshev</surname><given-names>Sergey V.</given-names></name><name xml:lang="ru"><surname>Нехорошев</surname><given-names>Сергей Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Tech.), associate professor</p></bio><bio xml:lang="ru"><p>д.т.н., доцент</p></bio><email>sv.nehoroshev@hmgma.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Khanty-Mansiysk State Medical Academy</institution></aff><aff><institution xml:lang="ru">Ханты-Мансийская государственная медицинская академия</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2023-09-05" publication-format="electronic"><day>05</day><month>09</month><year>2023</year></pub-date><pub-date date-type="pub" iso-8601-date="2023-10-03" publication-format="electronic"><day>03</day><month>10</month><year>2023</year></pub-date><volume>30</volume><issue>5</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>341</fpage><lpage>352</lpage><history><date date-type="received" iso-8601-date="2023-03-11"><day>11</day><month>03</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-08-12"><day>12</day><month>08</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Эко-Вектор</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</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/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://hum-ecol.ru/1728-0869/article/view/321267">https://hum-ecol.ru/1728-0869/article/view/321267</self-uri><abstract xml:lang="en"><p><bold><italic>AIM:</italic></bold> To study the effect of dihydroquercetin on the indicators of oxidative metabolism in young athletes engaged in the winter sports in the Khanty-Mansiysk Autonomous Okrug (KhMAO).</p> <p><bold><italic>MATERIAL AND METHODS:</italic></bold> The indicators of oxidative metabolism were studied in a group of 56 male students (mean age 19.30±0.51 years) from the Khanty-Mansiysk boarding school of the Olympic reserve. These students were actively involved in winter sports such as cross-country skiing and biathlon. To assess the impact of the plant-derived antioxidant bioflavonoid Baikal dihydroquercetin (DHQ), the participants were administered a daily dose of 120 mg of DHQ for a period of 60 days. Measurements were taken before and after the exposure. Blood lipid peroxidation (LPO) products were studied, namely, lipid hydroperoxides (LHP) and products that react with 2-thiobarbituric acid products (PR-TBA). Additionally, we examined the indicators of the body's antioxidant defense system (ADS) through the assessment of total antioxidant activity (TAA) and thiol status (TS). To quantify the overall oxidative stress experienced by the participants, we calculated the oxidative stress coefficient (OSC) using the formula: OSC = LHP × PR-TBA / TAA × TS.</p> <p><bold><italic>RESULTS:</italic></bold> The average levels of LPO values (HPL and PR-TBA) among KhMAO athletes have surpassed the upper limit of optimal values. On the other hand, the ADS parameters (TAA and TS) fall within the range of physiologically optimal values, albeit closer to the lower limit. Notably, athletes have exhibited an OSC increase that is nearly 3.5 times higher than the maximum allowable value. A quarter of the individuals examined displayed elevated HPL values, while more than 30% showed increased PR-TBA levels. A third of male athletes exhibited reduced ADS values compared to the physiologically optimal range. In total, 70.4% of skiers and biathletes in KhMAO have exceeded the OSC parameters. After two months of daily intake of 120 mg DHQ, the normalization of indicators of oxidative metabolism was observed. All parameters aligned with physiologically optimal values, except for OSC. We found a decrease in primary (LHP, 1.15 times) and secondary (PR-TBA, <italic>p</italic>=0.046) LPO indicators parallel to a significant increase in ADS indicators, specifically TAA (<italic>p</italic>=0.022) and TS (<italic>p</italic>=0.049). Conversely, there was a significant increase in ADS indicators, specifically TAA (<italic>p</italic>=0.022) and TS (<italic>p</italic>=0.049).</p> <p>Despite these positive changes, the OSC value, although significantly reduced (<italic>p</italic> &lt;0.001) by 2.3 times compared to the initial value, remained above the upper limit of the physiological norm.</p> <p><bold><italic>CONCLUSION:</italic></bold> The study demonstrated that young athletes engaged in winter sports experienced improved indicators of oxidative metabolism after a consistent two-month intake of the potent antioxidant DHQ. This led to the restoration of a balanced prooxidant-antioxidant state, enhanced overall well-being, and expedited recovery following intense physical exertion. Furthermore, our results may suggest that DHQ may contribute to prevention of non-communicable diseases in the future.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель исследования. </bold>Оценить корригирующее влияние дигидрокверцетина на показатели окислительного метаболизма у юношей-спортсменов, проживающих в Ханты-Мансийском автономном округе (ХМАО).</p> <p><bold>Материал и методы.</bold> Изучены показатели окислительного метаболизма у 56 юношей-студентов (средний возраст — 19,30±0,51 года) Югорского колледжа-интерната олимпийского резерва, занимающихся зимними видами спорта (лыжные гонки, биатлон), до и после приёма антиоксиданта растительного происхождения биофлавоноида дигидрокверцетина байкальского (ДГК). В течение 60 дней все юноши получали по 120 мг ДГК ежедневно. В крови у юношей определяли продукты перекисного окисления липидов (ПОЛ): гидроперекиси липидов (ГПл) и реагирующие с 2-тиобарбитуровой кислотой вещества (ВР-ТБК). Показатели антиоксидантной системы защиты организма (АОЗ) определяли по общей антиокислительной активности (ОАА) и тиоловому статусу (ТС). Коэффициент окислительного стресса (КОС) рассчитывали по формуле: КОС = ГПл × ВР-ТБК / ОАА × ТС.</p> <p><bold>Результаты.</bold> Средние величины ПОЛ (ГПл и ВР-ТБК) у спортсменов ХМАО превышали верхний предел оптимальных значений, а параметры АОЗ (ОАА и ТС) находились в диапазоне физиологически оптимальных величин, но ближе к нижней границе. Установлено возрастание КОС у спортсменов, почти в 3,5 раза превышающее максимально допустимое значение. Повышенные показатели ГПл были зарегистрированы у четвёртой части обследованных лиц, а ВР-ТБК — более чем у 30% в сочетании с пониженными показателями АОЗ относительно физиологически оптимальных значений у трети юношей-спортсменов северного региона. Важно отметить превышение параметров КОС у 70,4% лыжников и биатлонистов ХМАО.</p> <p>После двухмесячного ежедневного приёма ДГК установлена нормализация показателей окислительного метаболизма у обследованных лиц: все его параметры пришли в соответствие с физиологически оптимальными величинами, кроме КОС. Отмечено уменьшение первичных (ГПл — в 1,15 раза) и вторичных (ВР-ТБК, <italic>р</italic>=0,046) показателей ПОЛ на фоне статистически значимого увеличения параметров АОЗ: ОАА (<italic>р</italic>=0,022) и ТС (<italic>р</italic>=0,049). В то же время значение КОС, статистически значимо уменьшившееся (<italic>р </italic>&lt;0,001) в 2,3 раза в сопоставлении с величиной до коррекции, всё-таки осталось выше верхней границы физиологической нормы.</p> <p><bold>Заключение.</bold> Выявленная оптимизация показателей окислительного метаболизма у юношей-спортсменов зимних видов спорта после двухмесячного ежедневного приёма мощного антиоксиданта ДГК привела к нормализации показателей прооксидантно-антиоксидантного равновесия, улучшению общего самочувствия, скорейшему восстановлению после интенсивных физических нагрузок. Данный препарат может применяться для профилактики значительного числа неинфекционных заболеваний в будущем.</p></trans-abstract><kwd-group xml:lang="en"><kwd>North</kwd><kwd>young athletes</kwd><kwd>redox metabolism</kwd><kwd>dihydroquercetin</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>северный регион</kwd><kwd>юноши-спортсмены</kwd><kwd>окислительно-восстановительный метаболизм</kwd><kwd>дигидрокверцетин</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">Aliev SA. Vlijanie intensivnyh fizicheskih nagruzok na oksidativnyj stress i antioksidantnye izmenenija organizma sportsmenov. Chronos: Natural and Technical Sciences. 2020;2:17–22. (In Russ).</mixed-citation><mixed-citation xml:lang="ru">Алиев С.А. 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