Similar Hemoglobin Mass Response in Hypobaric and Normobaric Hypoxia in Athletes

Détails

ID Serval
serval:BIB_89615BDEE2DF
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Similar Hemoglobin Mass Response in Hypobaric and Normobaric Hypoxia in Athletes
Périodique
Medicine and Science In Sports and Exercise
Auteur(s)
Hauser A., Schmitt L., Troesch S., Saugy J.J., Cejuela-Anta R., Faiss R., Robinson N., Wehrlin J.P., Millet G.P.
ISSN
0195-9131
ISSN-L
1530-0315
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
48
Numéro
4
Pages
734-741
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
PURPOSE: To compare hemoglobin mass (Hbmass) changes during an 18-d live high-train low (LHTL) altitude training camp in normobaric hypoxia (NH) and hypobaric hypoxia (HH).
METHODS: Twenty-eight well-trained male triathletes were split into three groups (NH: n = 10, HH: n = 11, control [CON]: n = 7) and participated in an 18-d LHTL camp. NH and HH slept at 2250 m, whereas CON slept, and all groups trained at altitudes <1200 m. Hbmass was measured in duplicate with the optimized carbon monoxide rebreathing method before (pre-), immediately after (post-) (hypoxic dose: 316 vs 238 h for HH and NH), and at day 13 in HH (230 h, hypoxic dose matched to 18-d NH). Running (3-km run) and cycling (incremental cycling test) performances were measured pre and post.
RESULTS: Hbmass increased similar in HH (+4.4%, P < 0.001 at day 13; +4.5%, P < 0.001 at day 18) and NH (+4.1%, P < 0.001) compared with CON (+1.9%, P = 0.08). There was a wide variability in individual Hbmass responses in HH (-0.1% to +10.6%) and NH (-1.4% to +7.7%). Postrunning time decreased in HH (-3.9%, P < 0.001), NH (-3.3%, P < 0.001), and CON (-2.1%, P = 0.03), whereas cycling performance changed nonsignificantly in HH and NH (+2.4%, P > 0.08) and remained unchanged in CON (+0.2%, P = 0.89).
CONCLUSION: HH and NH evoked similar Hbmass increases for the same hypoxic dose and after 18-d LHTL. The wide variability in individual Hbmass responses in HH and NH emphasizes the importance of individual Hbmass evaluation of altitude training.
Pubmed
Web of science
Création de la notice
24/03/2016 14:34
Dernière modification de la notice
20/08/2019 14:48
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