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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="other" 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">695965</article-id><article-id pub-id-type="doi">10.17816/humeco695965</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></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Dynamics of the functional state of the external respiratory system in Yakut young men with different body weights over the past decade</article-title><trans-title-group xml:lang="ru"><trans-title>Динамика функционального состояния системы внешнего дыхания у юношей-якутов с разной массой тела за последнее десятилетие</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title/></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5775-6528</contrib-id><contrib-id contrib-id-type="spin">5466-7349</contrib-id><name-alternatives><name xml:lang="en"><surname>Stepanova</surname><given-names>Galina</given-names></name><name xml:lang="ru"><surname>СТЕПАНОВА</surname><given-names>Галина Касьяновна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Associate Professor, Professor of the Medical Institute of NEFU</p></bio><bio xml:lang="ru"><p>доцент, профессор Медицинского Института СВФУ</p></bio><email>g_k_step@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2395-1103</contrib-id><contrib-id contrib-id-type="spin">3734-3301</contrib-id><name-alternatives><name xml:lang="en"><surname>Malysheva</surname><given-names>Larisa Afanasyevna</given-names></name><name xml:lang="ru"><surname>Малышева</surname><given-names>Лариса Афанасьевна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>доцент</p></bio><email>mallaaf@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">M.K. Ammosov North-Eastern Federal University</institution></aff><aff><institution xml:lang="ru">Северо-Восточный федеральный университет им. М.К. Аммосова</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Medical Institute, North-Eastern Federal University named after. M.K. Ammosova</institution></aff><aff><institution xml:lang="ru">Мединститут, Северо-Восточный федеральный университет им. М.К. Аммосова</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-08-05" publication-format="electronic"><day>05</day><month>08</month><year>2026</year></pub-date><volume>33</volume><issue>6</issue><issue-title xml:lang="ru"/><history><date date-type="received" iso-8601-date="2025-11-08"><day>08</day><month>11</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-05-22"><day>22</day><month>05</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; , Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; , Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; , Eco-Vector</copyright-statement><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><copyright-holder xml:lang="zh">Eco-Vector</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/695965">https://hum-ecol.ru/1728-0869/article/view/695965</self-uri><abstract xml:lang="en"><p><bold><italic>BACKGROUND</italic></bold>: Currently, there are no comprehensive studies covering a decade that would allow us to determine the impact of changes in individual morphometric characteristics on respiratory function parameters in young people, taking into account ethnic differences.</p> <p><bold><italic> AIM:</italic></bold><italic> </italic> To study the dynamics of the functional state of the respiratory system in Yakut young men of different body weights over the past decade.</p> <p><bold><italic>METHODS:</italic></bold> The study included young men of Yakut ethnicity aged 18 to 21 years (93 respondents in 2010 and 90 in 2020-2022). Morphometric parameters (body length and weight (BW), chest circumference, and Quetelet index) were determined. The respiratory system was assessed using the Valenta+ hardware and software system and the Spiro-S-100 portable spirograph.</p> <p><bold><italic>RESULTS:</italic></bold><italic> </italic> The data obtained showed that over the past decade, a significant increase in BW has been accompanied by a significant decrease in expiratory reserve volume (ERV), as well as a trend toward decreased respiratory bronchial patency (BFR). Similar differences in respiratory patterns were observed between students with normal and elevated BW in 2020-2022: students with elevated BW showed significantly higher ERV and lower airflow in the respiratory bronchioles.</p> <p><bold><italic>CONCLUSION:</italic></bold> A significant increase in BW in students is associated with negative changes in respiratory parameters such as lung volumes and airway patency, which reduces respiratory system performance.</p></abstract><trans-abstract xml:lang="ru"><p>Обоснование. В настоящее время отсутствуют комплексные исследования на протяжении десятилетия, позволяющие определить влияние изменений отдельных морфометрических характеристик на показатели функции внешнего дыхания у молодежи с учетом этнических особенностей.Цель. Исследовать динамику функционального состояния системы внешнего дыхания у юношей-якутов с разной массой тела за последнее десятилетие. Методы. В исследовании приняли участие юноши якутской национальности в возрасте от 18 до 21 года (93 респондентов в 2010 году и 90 - в 2020-2022 гг.). Определялись морфометрические показатели (длина и масса тела (МТ), окружность грудной клетки, индекс Кетле). Состояние системы внешнего дыхания исследовалось на аппаратно-программном комплексе «Valenta+» и на портативном спирографе «Спиро-С-100».Результаты. Полученные данные показали, что за последнее десятилетие значимому увеличению МТ сопутствует значимое снижение резервного объема выдоха (РОвыд), а также тенденция к снижению проходимости респираторных бронхов (МОС75). Аналогичные отличия паттернов внешнего дыхания установлены в 2020-2022 гг. между студентами с нормальной и повышенной МТ: у студентов с повышенной МТ выявлено значимое превышение величины РОвыд и более низкая воздухоносность в респираторных бронхиолах. Заключение. Значимое повышение МТ у студентов ассоциируется с негативными изменениями таких параметров внешнего дыхания как легочные объемы и проходимость воздухоносных путей, что снижает функциональные возможности респираторной системы. </p></trans-abstract><trans-abstract xml:lang="zh"><p/></trans-abstract><kwd-group xml:lang="en"><kwd>respiratory system parameters</kwd><kwd>Yakut young men</kwd><kwd>body mass index.</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>показатели системы внешнего дыхания</kwd><kwd>юноши-якуты</kwd><kwd>индекс массы тела.</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>1. Samsonova A.N. Territorial differences in the health status of the population of Yakutia. International agricultural journal. - 2020. - No. 6. - P. 323-334. Doi:10.24411/2588-0209-2020-10257.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>2. World Health Organization. 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