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Effects of hyperoxia during recovery from 5 x 30-s bouts of maximal-intensity exercise
Berg Univ Wuppertal, Dept Sport Sci, D-42097 Wuppertal, Germany .
German Sport Univ Cologne, Inst Training Sci & Informat, Cologne, Germany.
German Sport Univ Cologne, Inst Training Sci & Informat, Cologne, Germany.
German Sport Univ Cologne, Inst Training Sci & Informat, Cologne, Germany.
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2012 (English)In: Journal of Sports Sciences, ISSN 0264-0414, E-ISSN 1466-447X, Vol. 30, no 9, 851-858 p.Article in journal (Refereed) Published
Abstract [en]

We test the hypothesis that breathing oxygen-enriched air (FIO2 = 100%) maintains exercise performance and reduces fatigue during intervals of maximal-intensity cycling. Ten well-trained male cyclists (age 25 +/- 3 years; peak oxygen uptake 64.8 +/- 6.2 ml . kg(-1) . min(-1); mean +/- s) were exposed to either hyperoxic or normoxic air during the 6-min intervals between five 30-s sessions of cycling at maximal intensity. The concentrations of lactate and hydrogen ions [H+], pH, base excess, oxygen partial pressure, and oxygen saturation in the blood were assessed before and after these sprints. The peak (P = 0.62) and mean power outputs (P=0.83) with hyperoxic and normoxic air did not differ. The partial pressure of oxygen was 4.2-fold higher after inhaling hyperoxic air, whereas lactate concentration, pH, [ H+], and base excess (P >= 0.17) were not influenced. Perceived exertion towards the end of the 6-min periods after the fourth and fifth sprints (P < 0.05) was lower with hyperoxia than normoxia (P < 0.05). These findings demonstrate that the peak and mean power outputs of athletes performing intervals of maximal-intensity cycling are not improved by inhalation of oxygen-enriched air during recovery.

Place, publisher, year, edition, pages
2012. Vol. 30, no 9, 851-858 p.
Keyword [en]
Acid-base balance, base excess, cycling, interval training, lactate, oxygen-enriched, power output, sprint
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-17076DOI: 10.1080/02640414.2012.671531ISI: 000304378900002Scopus ID: 2-s2.0-84865607972OAI: oai:DiVA.org:miun-17076DiVA: diva2:557418
Available from: 2012-09-27 Created: 2012-09-26 Last updated: 2015-03-19Bibliographically approved

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CiteExportLink to record
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Citation style
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