Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male Runners
Understanding the mechanisms of oxygen supply regulation, which involves the respiratory and cardiovascular systems, during human adaptation to intense physical activity, accompanied by hypoxemia, is important for the management of a training process. The objectives of this study were to investigate...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-06-01
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| Series: | Frontiers in Physiology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fphys.2020.00630/full |
| _version_ | 1819046349895630848 |
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| author | Dmitriy Yu Uryumtsev Valentina V. Gultyaeva Margarita I. Zinchenko Victor I. Baranov Vladimir N. Melnikov Natalia V. Balioz Sergey G. Krivoschekov |
| author_facet | Dmitriy Yu Uryumtsev Valentina V. Gultyaeva Margarita I. Zinchenko Victor I. Baranov Vladimir N. Melnikov Natalia V. Balioz Sergey G. Krivoschekov |
| author_sort | Dmitriy Yu Uryumtsev |
| collection | DOAJ |
| description | Understanding the mechanisms of oxygen supply regulation, which involves the respiratory and cardiovascular systems, during human adaptation to intense physical activity, accompanied by hypoxemia, is important for the management of a training process. The objectives of this study were to investigate the cardiorespiratory coherence (CRC) changes in the low-frequency band in response to hypoxic exposure and to verify a dependence of these changes upon sports qualification level in athletes. Twenty male runners aged 17–25 years were exposed to acute normobaric hypoxia (10% O2) for 10 min. Respiration, gas exchange, and heart rate were measured at baseline, during hypoxia, and after the exposure. To evaluate cardiorespiratory coupling, squared coherence was calculated based on 5-s averaged time series of heart and respiratory rhythms. Based on sports qualification level achieved over 4 years after the experimental testing, athletes were retrospectively divided into two groups, one high level (HLG, n = 10) and the other middle level (MLG, n = 10). No differences in anthropometric traits were observed between the groups. In the pooled group, acute hypoxia significantly increased CRC at frequencies 0.030–0.045 Hz and 0.075 Hz. In response to hypoxia, oxygen consumption decreased in HLG, and carbon dioxide production and ventilation increased in MLG. At 0.070–0.080 Hz frequencies in hypoxia, the CRC in HLG was higher than in MLG. Thus, highly qualified athletes enhance intersystem integration in response to hypoxia. This finding can be a physiological sign for the prognosis of qualification level in runners. |
| first_indexed | 2024-12-21T10:43:04Z |
| format | Article |
| id | doaj.art-ecd5950efdf844329aa61a00a1fcbf11 |
| institution | Directory Open Access Journal |
| issn | 1664-042X |
| language | English |
| last_indexed | 2024-12-21T10:43:04Z |
| publishDate | 2020-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physiology |
| spelling | doaj.art-ecd5950efdf844329aa61a00a1fcbf112022-12-21T19:06:53ZengFrontiers Media S.A.Frontiers in Physiology1664-042X2020-06-011110.3389/fphys.2020.00630523019Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male RunnersDmitriy Yu UryumtsevValentina V. GultyaevaMargarita I. ZinchenkoVictor I. BaranovVladimir N. MelnikovNatalia V. BaliozSergey G. KrivoschekovUnderstanding the mechanisms of oxygen supply regulation, which involves the respiratory and cardiovascular systems, during human adaptation to intense physical activity, accompanied by hypoxemia, is important for the management of a training process. The objectives of this study were to investigate the cardiorespiratory coherence (CRC) changes in the low-frequency band in response to hypoxic exposure and to verify a dependence of these changes upon sports qualification level in athletes. Twenty male runners aged 17–25 years were exposed to acute normobaric hypoxia (10% O2) for 10 min. Respiration, gas exchange, and heart rate were measured at baseline, during hypoxia, and after the exposure. To evaluate cardiorespiratory coupling, squared coherence was calculated based on 5-s averaged time series of heart and respiratory rhythms. Based on sports qualification level achieved over 4 years after the experimental testing, athletes were retrospectively divided into two groups, one high level (HLG, n = 10) and the other middle level (MLG, n = 10). No differences in anthropometric traits were observed between the groups. In the pooled group, acute hypoxia significantly increased CRC at frequencies 0.030–0.045 Hz and 0.075 Hz. In response to hypoxia, oxygen consumption decreased in HLG, and carbon dioxide production and ventilation increased in MLG. At 0.070–0.080 Hz frequencies in hypoxia, the CRC in HLG was higher than in MLG. Thus, highly qualified athletes enhance intersystem integration in response to hypoxia. This finding can be a physiological sign for the prognosis of qualification level in runners.https://www.frontiersin.org/article/10.3389/fphys.2020.00630/fullathleteshypoxiacardiorespiratory couplingsquared coherencecross-spectral analysisheart rate |
| spellingShingle | Dmitriy Yu Uryumtsev Valentina V. Gultyaeva Margarita I. Zinchenko Victor I. Baranov Vladimir N. Melnikov Natalia V. Balioz Sergey G. Krivoschekov Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male Runners Frontiers in Physiology athletes hypoxia cardiorespiratory coupling squared coherence cross-spectral analysis heart rate |
| title | Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male Runners |
| title_full | Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male Runners |
| title_fullStr | Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male Runners |
| title_full_unstemmed | Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male Runners |
| title_short | Effect of Acute Hypoxia on Cardiorespiratory Coherence in Male Runners |
| title_sort | effect of acute hypoxia on cardiorespiratory coherence in male runners |
| topic | athletes hypoxia cardiorespiratory coupling squared coherence cross-spectral analysis heart rate |
| url | https://www.frontiersin.org/article/10.3389/fphys.2020.00630/full |
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