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Pulmonary gas exchange is reduced by the cardiovascular diving response in resting humans
Lunds universitet.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering and Sustainable Development.
Responsible organisation
2008 (English)In: Respiratory Physiology & Neurobiology, ISSN 1569-9048, Vol. 160, no 3, 320-324 p.Article in journal (Refereed) Published
Abstract [en]

The diving response reduces the pulmonary O2 uptake in exercising humans, but it has been debated whether this effect is present at rest. Therefore, respiratory and cardiovascular responses were recorded in 16 resting subjects, performing apnea in air and apnea with face immersion in cold water (10 ◦C). Duration of apneas were predetermined to be identical in both conditions (average: 145 s) and based on individual maximal capacity (average: 184 s). Compared to apnea in air, an augmented diving response was elicited by apnea with face immersion. The O2 uptake from the lungs was reduced compared to the resting eupneic control (4.6 ml min−1 kg−1), during apnea in air (3.6 ml min−1 kg−1) and even more so during apnea with face immersion (3.4 ml min−1 kg -1). We conclude that the cardiovascular djustments of the diving response reduces pulmonary gas exchange in resting humans, allowing longer apneas by preserving the lungs’ O2 store for use by vital organs.

Place, publisher, year, edition, pages
2008. Vol. 160, no 3, 320-324 p.
Keyword [en]
Breath-hold, Bradycardia, Vasoconstriction, Alveolar gas exchange
National Category
Microbiology Sport and Fitness Sciences Physiology
Identifiers
URN: urn:nbn:se:miun:diva-4629DOI: 10.1016/j.resp.2007.10.016ISI: 000254770600010Scopus ID: 2-s2.0-44449100208Local ID: 5820OAI: oai:DiVA.org:miun-4629DiVA: diva2:29661
Available from: 2008-11-16 Created: 2008-11-12 Last updated: 2009-07-16Bibliographically approved

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Schagatay, Erika K.A
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CiteExportLink to record
Permanent link

Direct link
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf