<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">sredob</journal-id><journal-title-group><journal-title xml:lang="ru">Здоровье населения и среда обитания – ЗНиСО</journal-title><trans-title-group xml:lang="en"><trans-title>Public Health and Life Environment – PH&amp;LE</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2219-5238</issn><issn pub-type="epub">2619-0788</issn><publisher><publisher-name>ФБУЗ ФЦГиЭ Роспотребнадзора</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35627/2219-5238/2021-339-6-65-70</article-id><article-id custom-type="elpub" pub-id-type="custom">sredob-572</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>ГИГИЕНА ДЕТЕЙ И ПОДРОСТКОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PEDIATRIC HYGIENE</subject></subj-group></article-categories><title-group><article-title>Оценка функциональных резервов кардиореспираторной системы у учащихся кадетского корпуса</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of Functional Reserves of the Cardiorespiratory System in Students of Cadet Corps</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0442-9010</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Эйсфельд</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Eisfeld</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Эйсфельд Дарья Александровна – кандидат биологических наук, заместитель директора по общим вопросам</p><p>ул. Монастырская, д. 82, г. Пермь, 614045</p></bio><bio xml:lang="en"><p>Darja A. Eisfeld, Candidate of Biological Sciences, Deputy Director for General Issues, Federal Scientific Center for Medical and Preventive Health Risk Management Technologies of the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor)</p><p>82 Monastyrskaya Street, Perm, 614045 </p></bio><email xlink:type="simple">eisfeld@list.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/0000-0002-5017-8232</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Штина</surname><given-names>И. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Shtina</surname><given-names>I. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Штина Ирина Евгеньевна – кандидат медицинских наук, зав. лабораторией комплексных проблем здоровья детей с клинической группой медико-профилактических технологий управления рисками здоровья населения</p><p>ул. Монастырская, д. 82, г. Пермь, 614045</p></bio><bio xml:lang="en"><p>Irina E. Shtina, Candidate of Medical Sciences, Head of the Laboratory of Complex Problems of Children’s Health with a Clinical Group of Medical and Preventive Technologies for Managing Public Health Risks</p><p>82 Monastyrskaya Street, Perm, 614045 </p></bio><email xlink:type="simple">shtina_irina@fcrisk.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/0000-0001-9574-9353</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маклакова</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Maklakova</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маклакова Ольга Анатольевна – доктор медицинских наук, заведующая консультативно-поликлинческим отделением Федерального научного центра медико-профилактических технологий управления рисками здоровью населения; доцент кафедры экологии человека и безопасности жизнедеятельности ФГАОУ ВПО «Пермский государственный национальный исследовательский университет»</p><p>ул. Монастырская, д. 82, г. Пермь, 614045,</p><p>ул. Букирева, д. 15, г. Пермь, 614990</p></bio><bio xml:lang="en"><p>Olga A. Maklakova, D.M.Sc., Head of the Consultative Polyclinic Department, Federal Scientific Center for Medical and Preventive Health Risk Management Technologies; Associate Professor, Department of Human Ecology and Life Safety, Perm State National Research University</p><p>82 Monastyrskaya Street, Perm, 614045, </p><p>15 Bukirev Street, Perm, 614990</p></bio><email xlink:type="simple">olga_mcl@fcrisk.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/0000-0003-1719-1598</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Валина</surname><given-names>С. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Valina</surname><given-names>S. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валина Светлана Леонидовна – кандидат медицинских наук, заведующий отделом гигиены детей и подростков</p><p>ул. Монастырская, д. 82, г. Пермь, 614045</p></bio><bio xml:lang="en"><p>Svetlana L. Valina, Candidate of Medical Sciences, Head of the Department of Pediatric Hygiene</p><p>82 Monastyrskaya Street, Perm, 614045 </p></bio><email xlink:type="simple">doc.valina@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФБУН «Федеральный научный центр медико-профилактических технологий управления рисками здоровью населения» Роспотребнадзора</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Scientific Center for Medical and Preventive Health Risk Management Technologies</institution><country>Russian Federation</country></aff></aff-alternatives><aff xml:lang="ru" id="aff-2"><institution>ФБУН «Федеральный научный центр медико-профилактических технологий управления рисками здоровью населения» Роспотребнадзора;&#13;
ФГАОУ ВО «Пермский государственный национальный исследовательский университет»</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>10</day><month>07</month><year>2021</year></pub-date><volume>0</volume><issue>6</issue><fpage>65</fpage><lpage>70</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Эйсфельд Д.А., Штина И.Е., Маклакова О.А., Валина С.Л., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Эйсфельд Д.А., Штина И.Е., Маклакова О.А., Валина С.Л.</copyright-holder><copyright-holder xml:lang="en">Eisfeld D.A., Shtina I.E., Maklakova O.A., Valina S.L.</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://zniso.fcgie.ru/jour/article/view/572">https://zniso.fcgie.ru/jour/article/view/572</self-uri><abstract><sec><title>Введение</title><p>Введение. Обучение в кадетском корпусе предполагает увеличение двигательной активности, что влияет на уровень функциональных возможностей систем адаптации.</p></sec><sec><title>Цель исследования</title><p>Цель исследования. Изучить особенности функциональных резервов кардиореспираторной системы у учащихся кадетского корпуса.</p></sec><sec><title>Методы</title><p>Методы. Группу наблюдения составили 74 кадета в возрасте 10–13 лет, группу сравнения – 26 мальчиков, обучающихся в средней общеобразовательной школе (СОШ). Изучение режима физической нагрузки проведено с помощью анкетирования. Оценка тренированности, физической работоспособности выполнена по данным биоимпедансного анализа состава тела и динамометрии. Функциональное состояние кардиореспираторной системы оценивали по показателям пробы задержки дыхания на вдохе и выдохе, индекса Скибинской, спирографии, кардиоинтервалографии с выполнением активной клиноортостатической пробы. Статистический анализ проведен с применением стандартных методов.</p></sec><sec><title>Результаты</title><p>Результаты. Каждый второй кадет регулярно занимается физкультурой и спортом. Физическое развитие кадетов характеризуется более высокими значениями фазового угла, активной клеточной и скелетно-мышечной массы, динамометрии. Функциональные резервы кардиореспираторной системы по индексу Скибинской, значения времени задержки дыхания на вдохе и выдохе у кадетов превышали в 1,3–1,7 раза показатели учащихся СОШ; количество детей с хорошими результатами проб в группе наблюдения было в 1,4–3,3 раза больше. У кадетов показатели кардиоинтервалографии ВР, ИВР, ВПР и ИН в 1,2–1,6 раза значимо отличались от показателей группы сравнения и свидетельствовали об активации парасимпатического отдела вегетативной нервной системы в покое и симпатического отдела при нагрузке на стресс-фактор. Каждый третий ребенок группы наблюдения имел исходную ваготонию, гиперсимпатикотония встречалась в единичных случаях. При проведении нагрузочного теста у 60,8 % кадет регистрировали гиперсимпатикотонический вариант вегетативной реактивности.</p></sec><sec><title>Выводы</title><p>Выводы. Достаточная двигательная активность кадет улучшает показатели физического развития и мышечной силы, что сопровождается увеличением функциональных резервов дыхательной и сердечно-сосудистой систем. Однако наличие гиперсимпатикотонической вегетативной реактивности может свидетельствовать о напряжении процессов адаптации при нагрузке.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction: Training in the cadet corps involves an increase in motor activity, which affects the level of functional capabilities of adaptation systems.</p><p>The objective of our work was to study the features of functional reserves of the cardiorespiratory system in cadets.</p></sec><sec><title>Materials and methods</title><p>Materials and methods: The observation group consisted of 74 cadets aged 10–13 years; the comparison group consisted of 26 secondary school boys. The study of the mode of physical activity was carried out using a questionnaire. Evaluation of fitness and physical performance was carried out according to bioimpedance analysis of body composition and dynamometry. The functional state of the cardiorespiratory system was assessed by the parameters of the breath holding test during inhalation and exhalation, the Skibinskaya index, spirography, cardiointervalography with an active clinoorthostatic test. Statistical analysis was performed using standard methods.</p></sec><sec><title>Results</title><p>Results: Every second cadet regularly goes in for physical education and sports. The physical development of cadets is characterized by higher values of the phase angle, active cellular and musculoskeletal mass, and dynamometry. The functional reserves of the cardiorespiratory system according to the Skibinskaya index, the values of the breath holding time during inhalation and exhalation in cadets were 1.3–1.7 times higher than those in secondary school boys; the number of children with good test results in the observation group was 1.4-3.3 times more than that in the controls. The indices of cardiointervalography (variation range, vegetative balance index, vegetative balance index, and tension index) in cadets differed significantly from those in the comparison group (by 1.2–1.6 times) and indicated the activation of the parasympathetic part of the autonomic nervous system at rest and the activity of the sympathetic part under load in response to a stress factor. Every third child in the observation group had an initial vagotonia; hypersympathicotonia was found in isolated cases. A hypersympathicotonic variant of autonomic reactivity was registered in 60.8 % of cadets during the exercise test.</p></sec><sec><title>Conclusion</title><p>Conclusion: Sufficient physical activity of cadets improves the indices of physical development and muscle strength, which is accompanied by an increase in the functional reserves of the respiratory and cardiovascular systems. However, the presence of hypersympathicotonic autonomic reactivity may indicate tension of adaptation processes during exercise.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>физическое развитие</kwd><kwd>кардиореспираторная система</kwd><kwd>адаптационные резервы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cadets</kwd><kwd>physical development</kwd><kwd>cardiorespiratory system</kwd><kwd>adaptation reserves</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">Кузнецова А.П., Тятенкова Н.Н. Сравнительная характеристика резервных возможностей кардиореспираторной системы у подростков в зависимости от гармоничности физического развития. Ярославский педагогический вестник. 2013. Т. 3. № 2. С. 109–13.</mixed-citation><mixed-citation xml:lang="en">Kuznetsova AP, Tyatenkova NN. Comparative characteristics of reserve potentialities of the cardiorespiratory system in adolescents according to harmony of physical development. Yaroslavskiy Pedagogicheskiy Vestnik. 2013;3(2):109–13. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Новоселова Е.Н. Роль семьи в формировании здорового образа жизни и смягчении факторов риска, угрожающих здоровью детей и подростков. Анализ риска здоровью. 2019. № 4. С. 175–85. https://doi.org/10.21668/health.risk/2019.4.19</mixed-citation><mixed-citation xml:lang="en">Novoselova EN. Role played by a family in creating healthy lifestyle and eliminating risk factors that cause threats to children’s and teenagers’ health. Health Risk Analysis. 2019;(4): 175–85. (In Russian). doi: 10.21668/health.risk/2019.4.19</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Alves JGB, Alves GV. Effects of physical activity on children’s growth. J Pediatr (Rio J). 2019;95 Suppl 1:72–78. doi: 10.1016/j.jped.2018.11.003</mixed-citation><mixed-citation xml:lang="en">Alves JGB, Alves GV. Effects of physical activity on children’s growth. J Pediatr (Rio J). 2019;95 Suppl 1:72–78. doi: 10.1016/j.jped.2018.11.003</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Kondratiuk OS, Korshun MM, Garkavyi SI, et al. Hygienic assessment of different forms of physical education lessons organization in primary school. Wiad Lek. 2018;71(3 Pt 1):542–545.</mixed-citation><mixed-citation xml:lang="en">Kondratiuk OS, Korshun MM, Garkavyi SI, et al. Hygienic assessment of different forms of physical education lessons organization in primary school. Wiad Lek. 2018;71(3 Pt 1):542–545.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Sharma M, Nahar VK. Promoting physical activity in upper elementary children using multi-theory model (MTM) of health behavior change. J Prev Med Hyg. 2018;59(4):E267–E276. doi: 10.15167/2421-4248/jpmh2018.59.4.847</mixed-citation><mixed-citation xml:lang="en">Sharma M, Nahar VK. Promoting physical activity in upper elementary children using multi-theory model (MTM) of health behavior change. J Prev Med Hyg. 2018;59(4):E267–E276. doi: 10.15167/2421-4248/jpmh2018.59.4.847</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Скрыпник О.Ю. Климацкая Л.Г., Меняйло А.В., Лесовская М.И., Макарская Г.В., Тарских С.В. Иммунореактивность и адаптационные возможности организма кадет. В кн.: Материалы Всероссийской научной конференции с международным участием «Север-человек: проблемы сохранения здоровья». Красноярск, 2001. С. 250–1.</mixed-citation><mixed-citation xml:lang="en">Skrypnik Oyu, Klimatskaya LG, Menyaylo AV, Lesovskaya MI, Makarskaya GV, Tarskikh SV. [Immunoreactivity and adaptive capabilities of the cadet organism.] In: North and Man: Problems of Health Preservation: Proceedings of the All-Russian Scientific Conference with international participation. Krasnoyarsk; 2001:250–1. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Бородина И.Г. Кадетские классы и проблемы сохранения здоровья обучающихся в них детей. Инновационные проекты и программы в образовании. 2009. № 4. С. 3–6.</mixed-citation><mixed-citation xml:lang="en">Borodina IG. [Cadet classes and the problems of maintaining health of children studying in them.] Innovatsionnye Proekty i Programmy v Obrazovanii. 2009;(4):3–6. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Богомолова Е.С., Шапошникова М.В., Котова Н.В., Бадеева Т.В., Максименко Е.О., Киселева А.С. и др. Характеристика физического здоровья учащихся современных общеобразовательных организаций. Гигиена и санитария. 2019. Т. 98. № 9. С. 956–61. doi: https://doi.org/10.18821/0016-9900-2019-98-9-956-961</mixed-citation><mixed-citation xml:lang="en">Bogomolova ES, Shaposhnikova MV, Kotova NV, et al. Characteristics of physical health of students of modern educational institutions. Gigiena i Sanitariya. 2019;98(9):956–61. (In Russian). doi: 10.18821/0016-9900-2019-98-9-956-961</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Marker AM, Steele RG, Noser AE. Physical activity and health-related quality of life in children and adolescents: A systematic review and meta-analysis. Health Psychol. 2018;37(10):893–903. doi: 10.1037/hea0000653</mixed-citation><mixed-citation xml:lang="en">Marker AM, Steele RG, Noser AE. Physical activity and health-related quality of life in children and adolescents: A systematic review and meta-analysis. Health Psychol. 2018;37(10):893–903. doi: 10.1037/hea0000653</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Curtis BM, O’Keefe JH Jr. Autonomic tone as a cardiovascular risk factor: the dangers of chronic fight or flight. Mayo Clin Proc. 2002;77(1):45–54. doi: 10.4065/77.1.45</mixed-citation><mixed-citation xml:lang="en">Curtis BM, O’Keefe JH Jr. Autonomic tone as a cardiovascular risk factor: the dangers of chronic fight or flight. Mayo Clin Proc. 2002;77(1):45–54. doi: 10.4065/77.1.45</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Буряк В.Н., Журавлева Н.С., Покусаева О.С. Особенности исходного вегетативного тонуса и вегетативной реактивности при вегетососудистой дисфункции по гипотензивному типу в детском возрасте. Педиатр. 2018. Т. 9. № 2. С. 41–8. doi: https://doi.org/10.17816/PED9241-48</mixed-citation><mixed-citation xml:lang="en">Buryak VN, Zhuravleva NS, Pokusaeva OS. Features of the initial vegetative tone and vegetative reactivity in vegetative-vascular dysfunction of the hypotensive type in childhood. Pediatr. 2018;9(2):41–8. (In Russian). doi: 10.17816/PED9241-48</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Кильдиярова Р.Р. Лабораторные и функциональные исследования в практике педиатра [Электронный ресурс] 3-e изд. М.: ГЭОТАР-Медиа. 2015: 192 с.</mixed-citation><mixed-citation xml:lang="en">Kildiyarova RR. [Laboratory and Functional Tests in the Practice of a Pediatrician]. 3rd ed. Moscow: GEOTAR-Media Publ., 2015. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Кунгуров Е. Н. Современные подходы в формировании здорового образа жизни воспитанников кадетских училищ // Молодой ученый. 2016; № 28 (132). С. 908–910.</mixed-citation><mixed-citation xml:lang="en">Kungurov EN. [Modern approaches to forming a healthy lifestyle in students of cadet schools.] Molodoy Uchenyy. 2016;28(132):908–910. (In Russian). Accessed on April 10, 2021. https://moluch.ru/archive/132/37067/</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Перекусихин М.В., Васильев В.В., Рябинина Т.В., Васильев Е.В. Санитарно-эпидемиологическое благополучие и здоровье обучающихся образовательных организаций в современных условиях // Здоровье населения и среда обитания. 2020. № 8 (329). С. 31–37. doi: https://doi.org/10.35627/2219-5238/2020-329-8-31-37</mixed-citation><mixed-citation xml:lang="en">Perekusikhin MV, Vasilyev VV, Ryabinina TV, Vasilyev EV. Sanitary and epidemiologic wellbeing and health of school children in modern conditions. Zdorov’e Naseleniya i Sreda Obitaniya. 2020;(8(329)):31–37. (In Russian). doi: 10.35627/2219-5238/2020-329-8-31-37</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Barbosa SC, Coledam DH, Neto AS, Elias RG, de Oliveira AR. School environment, sedentary behavior and physical activity in preschool children. Rev Paul Pediatr. 2016;34(3):301–8. doi: 10.1016/j.rpped.2016.01.001</mixed-citation><mixed-citation xml:lang="en">Barbosa SC, Coledam DH, Neto AS, Elias RG, de Oliveira AR. School environment, sedentary behavior and physical activity in preschool children. Rev Paul Pediatr. 2016;34(3):301–8. doi: 10.1016/j.rpped.2016.01.001</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Weaver RG, Webster CA, Egan C, Campos CMC, Michael RD, Vazou S. Partnerships for active children in elementary schools: Outcomes of a 2-year pilot study to increase physical activity during the school day. Am J Health Promot. 2018;32(3):621–630. doi: 10.1177/0890117117707289</mixed-citation><mixed-citation xml:lang="en">Weaver RG, Webster CA, Egan C, Campos CMC, Michael RD, Vazou S. Partnerships for active children in elementary schools: Outcomes of a 2-year pilot study to increase physical activity during the school day. Am J Health Promot. 2018;32(3):621–630. doi: 10.1177/0890117117707289</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Шевко Н.Б. Анализ динамики основных биоимпедансных показателей состава тела спортсменов. Проблемы здоровья и экологии. 2007. № 2 (12). С. 101–5.</mixed-citation><mixed-citation xml:lang="en">Shevko NB. Analysis of the dynamics of the main bioimpedance parameters of sportsmen body composition. Problemy Zdorov’ya i Ekologii. 2007;(2(12)):101–5. (In Russian).</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Богачев А.Н., Осадшая Л.Б., Грецкая И.Б. Возрастная динамика состояния функциональных резервов школьников с различным уровнем здоровья и двигательной активности. Современные проблемы науки и образования. 2015. № 3. Available at: http://science-education.ru/ru/article/view?id=22212</mixed-citation><mixed-citation xml:lang="en">Bogachev AN, Osadshaya LB, Gretskaya IB. [Age dynamics of the status of functional reserves in schoolchildren with different levels of health and motor activity.] Sovremennye Problemy Nauki i Obrazovaniya. 2015;(3). (In Russian). Accessed on April 10, 2021. http://science-education.ru/ru/article/view?id=22212</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Norman K, Stobäus N, Pirlich M, Bosy-Westphal A. Bioelectrical phase angle and impedance vector analysis – clinical relevance and applicability of impedance parameters. Clin Nutr. 2012;31(6):854–61. doi: 10.1016/j.clnu.2012.05.008</mixed-citation><mixed-citation xml:lang="en">Norman K, Stobäus N, Pirlich M, Bosy-Westphal A. Bioelectrical phase angle and impedance vector analysis – clinical relevance and applicability of impedance parameters. Clin Nutr. 2012;31(6):854–61. doi: 10.1016/j.clnu.2012.05.008</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Langer RD, da Costa KG, Bortolotti H, Fernandes GA, de Jesus RS, Gonçalves EM. Phase angle is associated with cardiorespiratory fitness and body composition in children aged between 9 and 11 years. Physiol Behav. 2020;215:112772. doi: 10.1016/j.physbeh.2019.112772</mixed-citation><mixed-citation xml:lang="en">Langer RD, da Costa KG, Bortolotti H, Fernandes GA, de Jesus RS, Gonçalves EM. Phase angle is associated with cardiorespiratory fitness and body composition in children aged between 9 and 11 years. Physiol Behav. 2020;215:112772. doi: 10.1016/j.physbeh.2019.112772</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Cayres SU, Vanderlei LC, Rodrigues AM, et al. Prática esportiva está relacionada à atividade parassimpática em adolescentes [Sports practice is related to parasympathetic activity in adolescents]. Rev Paul Pediatr. 2015;33(2):174–80. (In Portuguese). doi: 10.1016/j.rpped.2014.09.002</mixed-citation><mixed-citation xml:lang="en">Cayres SU, Vanderlei LC, Rodrigues AM, et al. Prática esportiva está relacionada à atividade parassimpática em adolescentes [Sports practice is related to parasympathetic activity in adolescents]. Rev Paul Pediatr. 2015;33(2):174–80. (In Portuguese). doi: 10.1016/j.rpped.2014.09.002</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
