Effect of intermittent normobaric hypoxic exposure at rest on haematological, physiological, and performance parameters in multi-sport athletes
Deutscher übersetzter Titel: | Auswirkung einer intermittierenden, normobaren hypoxischen Belastung in Ruhe auf hämatologische, physiologische und leistungsbezogene Faktoren bei Allroundsportlern |
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Autor: | Hamlin, Michael John; Hellemans, John |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 25 (2007), 4, S. 431-441, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640410600718129 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201312008685 |
Quelle: | BISp |
Abstract des Autors
The aim of this study was to determine whether 3 weeks of intermittent normobaric hypoxic exposure at rest was able to elicit changes that would benefit multi-sport athletes. Twenty-two multi-sport athletes of mixed ability were exposed to either a normobaric hypoxic gas (intermittent hypoxic training group) or a placebo gas containing normal room air (placebo group). The participants breathed the gas mixtures in 5-min intervals interspersed with 5-min recovery periods of normal room air for a total of 90 min per day, 5 days per week, over a 3-week period. The oxygen in the hypoxic gas decreased from 13% in week 1 to 10% by week 3. The training and placebo groups underwent a total of four performance tests, including a familiarization and baseline trial before the intervention, followed by trials at 2 and 17 days after the intervention. Time to complete the 3-km run decreased by 1.7%[95% confidence interval (CI) = −0.6 – 3.9%] 2 days after, and by 2.3% (CI = 0.25 − 4.4%) 17 days after, the last hypoxic episode in the training relative to the placebo group. Substantial changes in the training relative to the placebo group also included increased reticulocyte count 2 days (23.5%; CI =−1.9 to 44.9%) and 12 days (14.6%; CI = −7.1 to 36.4%) post-exposure. The effect of intermittent hypoxic training on 3-km performance found in this study is likely to be beneficial, which suggests non-elite multi-sport athletes should expect such training to enhance performance. Verf.-Referat