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High hemoglobin levels in divers may be a result of apnea induced EPO-production
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. (Nationellt Vintersportcentrum / Swedish Winter Sports Research Centre)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. (Nationellt Vintersportcentrum / Swedish Winter Sports Research Centre)
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (Nationellt Vintersportcentrum / Swedish Winter Sports Research Centre)
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2005 (English)In: FASEB JOURNAL, 2005, A211-A212 p.Conference paper, (Refereed)
Abstract [en]

Oxygen storage capacity is important for apneic duration and affects performance in endurance sports. We studied if hemoglobin concentration (Hb) was different in divers compared to endurance athletes and untrained subjects and if any differences could be connected to training-induced erythropoietin (EPO) -production. We first compared Hb in 3 groups of subjects: 13 elite apneic divers (35±4 years), 13 elite cross-country skiers (20±1 years) and 23 untrained subjects (29±1 years) with similar weight and height. After 20 min of horizontal rest blood samples were drawn and analysed for Hb using standard methods. In a second experiment, we compared EPO levels before and after a series of 15 maximal apneas in air in 9 previously untrained volunteers (302 years). Apneas were spaced by 2 minutes, the last minute with hyperventilation to produce durations long enough to induce hypoxia. Values were also compared to the EPO levels of a control day without apneas. The apneic divers had higher Hb than untrained subjects (P<0.05) and skiers (P<0.01). After apnea training in untrained subjects EPO levels increased in all subjects, with a mean peak value after 3 h, where the increase was 135 % of the pre apnea value (P<0.05). No increase was observed during the same time period of the control day. We concluded that higher Hb levels in apneic divers may be a result of enhanced EPO-production due to the apnea training.

Place, publisher, year, edition, pages
2005. A211-A212 p.
Series
FASEB JOURNAL, ISSN 0892-6638 ; 19-4
Keyword [en]
EPO
National Category
Microbiology Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-2789ISI: 000227610701334Local ID: 2313OAI: oai:DiVA.org:miun-2789DiVA: diva2:27821
Conference
Experimental Biology 2005 Meeting/35th International Congress of Physiological Sciences, Mar 31-Apr 06, 2005, San Diego CA
Available from: 2008-09-30 Created: 2009-07-27 Last updated: 2011-04-12Bibliographically approved

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de Bruijn, RobertRichardson, MatthewHaughey, HelenaBjörklund, GlennPettersson, SofiaSchagatay, Erika
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