Same Performance Changes after Live High-Train Low in Normobaric vs. Hypobaric Hypoxia.

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State: Serval
Version: Final published version
Serval ID
serval:BIB_50C5952C1B98
Type
Article: article from journal or magazin.
Collection
Publications
Title
Same Performance Changes after Live High-Train Low in Normobaric vs. Hypobaric Hypoxia.
Journal
Frontiers In Physiology
Author(s)
Saugy J.J., Schmitt L., Hauser A., Constantin G., Cejuela R., Faiss R., Wehrlin J.P., Rosset J., Robinson N., Millet G.P.
ISSN
1664-042X (Electronic)
ISSN-L
1664-042X
Publication state
Published
Issued date
2016
Peer-reviewed
Oui
Volume
7
Number
138
Pages
138
Language
english
Notes
Publication types: Journal Article Publication Status: epublish
Abstract
PURPOSE: We investigated the changes in physiological and performance parameters after a Live High-Train Low (LHTL) altitude camp in normobaric (NH) or hypobaric hypoxia (HH) to reproduce the actual training practices of endurance athletes using a crossover-designed study.
METHODS: Well-trained triathletes (n = 16) were split into two groups and completed two 18-day LTHL camps during which they trained at 1100-1200 m and lived at 2250 m (P i O2 = 111.9 ± 0.6 vs. 111.6 ± 0.6 mmHg) under NH (hypoxic chamber; FiO2 18.05 ± 0.03%) or HH (real altitude; barometric pressure 580.2 ± 2.9 mmHg) conditions. The subjects completed the NH and HH camps with a 1-year washout period. Measurements and protocol were identical for both phases of the crossover study. Oxygen saturation (S p O2) was constantly recorded nightly. P i O2 and training loads were matched daily. Blood samples and VO2max were measured before (Pre-) and 1 day after (Post-1) LHTL. A 3-km running-test was performed near sea level before and 1, 7, and 21 days after training camps.
RESULTS: Total hypoxic exposure was lower for NH than for HH during LHTL (230 vs. 310 h; P < 0.001). Nocturnal S p O2 was higher in NH than in HH (92.4 ± 1.2 vs. 91.3 ± 1.0%, P < 0.001). VO2max increased to the same extent for NH and HH (4.9 ± 5.6 vs. 3.2 ± 5.1%). No difference was found in hematological parameters. The 3-km run time was significantly faster in both conditions 21 days after LHTL (4.5 ± 5.0 vs. 6.2 ± 6.4% for NH and HH), and no difference between conditions was found at any time.
CONCLUSION: Increases in VO2max and performance enhancement were similar between NH and HH conditions.
Pubmed
Web of science
Open Access
Yes
Create date
06/05/2016 12:23
Last modification date
08/05/2019 18:32
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