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Ventilatory Pattern Influences Tolerance to Normobaric Hypoxia in Healthy Adults

Author

Listed:
  • Inés Albertus-Cámara

    (Research Group of Physical Exercise and Human Performance, Mare Nostrum Campus, University of Murcia, 30100 Murcia, Spain)

  • Cristina Rochel-Vera

    (Research Group of Physical Exercise and Human Performance, Mare Nostrum Campus, University of Murcia, 30100 Murcia, Spain)

  • Jose-Luis Lomas-Albaladejo

    (Research Group of Physical Exercise and Human Performance, Mare Nostrum Campus, University of Murcia, 30100 Murcia, Spain)

  • Vicente Ferrer-López

    (Research Group of Physical Exercise and Human Performance, Mare Nostrum Campus, University of Murcia, 30100 Murcia, Spain)

  • Ignacio Martínez-González-Moro

    (Research Group of Physical Exercise and Human Performance, Mare Nostrum Campus, University of Murcia, 30100 Murcia, Spain)

Abstract

Introduction: Tolerance to breathing in conditions with a decreased oxygen ratio is subject-specific. A normobaric hypoxia tolerance test (NHTT) is performed to assess the ability of each individual, as this may be influenced by genetic or personal factors such as age or gender. The aim of this study is to test the influence of deep breathing on hypoxia tolerance time. Material and methods: A total of 45 subjects (21 parachutists and 24 students) performed two NHTTs at 5050 m altitude (iAltitude). Arterial (SatO 2 ) and muscle (SmO 2 ) oxygen saturation were monitored with the Humon Hex ® device. The first NHTT was performed with free breathing, without any instructions; and the second NHTT was performed with wide, slow, diaphragmatic breathing. The NHTT was terminated at the end of 10 min or when a value of less than 83% was obtained. Results: The first NHTT was completed by 38.1% of parachutist and 33.3% of students while the second NHTT was completed by 85.7% and 75%, respectively. In the second NHTT, both parachutists and students had a significantly ( p = 0.001) longer duration compared to the first NHTT. SmO 2 and SatO 2 values also increased significantly ( p < 0.001) in both groups ( p < 0.05). Conclusion: Performing controlled diaphragmatic breathing is successful in increasing hypoxia tolerance time and/or SatO 2 values.

Suggested Citation

  • Inés Albertus-Cámara & Cristina Rochel-Vera & Jose-Luis Lomas-Albaladejo & Vicente Ferrer-López & Ignacio Martínez-González-Moro, 2023. "Ventilatory Pattern Influences Tolerance to Normobaric Hypoxia in Healthy Adults," IJERPH, MDPI, vol. 20(6), pages 1-13, March.
    • Handle: RePEc:gam:jijerp:v:20:y:2023:i:6:p:4935-:d:1094127
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    References listed on IDEAS

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    1. Agata Nowak-Lis & Tomasz Gabryś & Zbigniew Nowak & Paweł Jastrzębski & Urszula Szmatlan-Gabryś & Anna Konarska & Dominika Grzybowska-Ganszczyk & Anna Pilis, 2021. "The Use of Artificial Hypoxia in Endurance Training in Patients after Myocardial Infarction," IJERPH, MDPI, vol. 18(4), pages 1-11, February.
    2. Naomi Maldonado-Rodriguez & David J. Bentley & Heather M. Logan-Sprenger, 2022. "Acute Physiological Response to Different Sprint Training Protocols in Normobaric Hypoxia," IJERPH, MDPI, vol. 19(5), pages 1-11, February.
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