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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">Human Physiology</journal-id><journal-title-group><journal-title xml:lang="en">Human Physiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Физиология человека</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0131-1646</issn><issn publication-format="electronic">3034-6150</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">664061</article-id><article-id pub-id-type="doi">10.31857/S0131164624050035</article-id><article-id pub-id-type="edn">AOPWFR</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">The Effect of Added Mass on Pulmonary Function</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние дополнительной весовой нагрузки на функцию внешнего дыхания</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Segizbaeva</surname><given-names>M. O.</given-names></name><name xml:lang="ru"><surname>Сегизбаева</surname><given-names>М. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>segizbaevamo@infran.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Maksimenko</surname><given-names>B. A.</given-names></name><name xml:lang="ru"><surname>Максименко</surname><given-names>Б. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>segizbaevamo@infran.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Korolyov</surname><given-names>Yu. N.</given-names></name><name xml:lang="ru"><surname>Королев</surname><given-names>Ю. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>segizbaevamo@infran.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Aleksandrova</surname><given-names>N. P.</given-names></name><name xml:lang="ru"><surname>Александрова</surname><given-names>Н. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>segizbaevamo@infran.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Pavlov Institute of Physiology of the RAS</institution></aff><aff><institution xml:lang="ru">Институт физиологии имени И.П. Павлова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">S.M. Kirov Military Medical Academy</institution></aff><aff><institution xml:lang="ru">Военно-медицинская академия имени С.М. Кирова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-11-20" publication-format="electronic"><day>20</day><month>11</month><year>2024</year></pub-date><volume>50</volume><issue>5</issue><fpage>21</fpage><lpage>28</lpage><history><date date-type="received" iso-8601-date="2025-02-25"><day>25</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0131-1646/article/view/664061">https://journals.eco-vector.com/0131-1646/article/view/664061</self-uri><abstract xml:lang="en"><p>A comparative study of the volume-velocity parameters of the human external respiration system was carried out under the influence of an additional weight load: a body armor weighing 11 kg and a backpack weighing 15 kg. The nature of changes in the main spirometric parameters under the influence of an added mass is typical for restrictive disorders of pulmonary function. A marked decrease in forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV<sub>1</sub>) values was observed when performing the test with a protective vest. In the conditions of a combination of body armor and a backpack, these changes were more pronounced (p &lt; 0.01). At the same time, there were no significant changes in the Tiffno index values (FEV<sub>1</sub>/FVC). In addition, a significant decrease in the values of maximum voluntary ventilation (MVV) was revealed by 8.1% under the influence of body armor, and by 18.5% with a combination of a vest and a backpack relative to the control (p &lt; 0.01). A significant correlation was shown between the maximum force of contraction of the inspiratory muscles and the maximum voluntary ventilation of the lungs both in the control and with an additional weight load. It is possible that the inspiratory muscles training, aimed at increasing their strength and endurance, can be an effective strategy for minimizing the adverse effects of increased weight load when performing work with special protective equipment in various areas of human professional activity.</p></abstract><trans-abstract xml:lang="ru"><p>Проведено сравнительное исследование объемно-скоростных показателей системы внешнего дыхания человека в условиях действия дополнительной весовой нагрузки: бронежилета весом 11 кг и рюкзака весом 15 кг. Характер изменений основных спирометрических параметров при действии повышенной весовой нагрузки типичен для рестриктивных нарушений легочной функции. Выраженное снижение значений форсированной жизненной емкости легких (<italic>FVC</italic>) и объема форсированного выдоха за 1 с (<italic>FEV</italic><sub>1</sub>) наблюдалось при выполнении теста с защитным бронежилетом. В условиях сочетания бронежилета и рюкзака эти изменения были выражены в большей степени (<italic>p</italic> &lt; 0.01). При этом не отмечено значимых изменений величин индекса Тиффно (<italic>FEV</italic><sub>1</sub>/<italic>FVC</italic>). Кроме того, выявлено достоверное снижение значений максимальной произвольной вентиляции легких (<italic>MVV</italic>) на 8.1% в условиях действия бронежилета и на 18.5% при сочетании жилета и рюкзака относительно контроля (<italic>p</italic> &lt; 0.01). Показана значимая корреляция между максимальной силой сокращений инспираторных мышц и максимальной произвольной вентиляцией легких как в контроле, так и при дополнительной весовой нагрузке. Возможно, что тренировка инспираторных мышц, направленная на увеличение их силы и выносливости, может быть эффективной стратегией для минимизации неблагоприятных последствий увеличенной весовой нагрузки при выполнении работ со специальным защитным оборудованием в разных сферах профессиональной деятельности человека.</p></trans-abstract><kwd-group xml:lang="en"><kwd>spirometry</kwd><kwd>respiratory muscles</kwd><kwd>maximal inspiratory pressure</kwd><kwd>maximal voluntary ventilation</kwd><kwd>chest protection</kwd><kwd>body armor</kwd><kwd>backpack</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>спирометрия</kwd><kwd>дыхательные мышцы</kwd><kwd>максимальное инспираторное давление</kwd><kwd>максимальная произвольная вентиляция легких</kwd><kwd>средства защиты грудной клетки</kwd><kwd>бронежилет</kwd><kwd>рюкзак</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of the Russian Federation</institution></institution-wrap></funding-source><award-id>1021062411787-0-3.1.8</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Muza S.R., Latzka W.A., Epstein Y., Pandolf K.B. 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