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Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes

The present study determined metabolic and performance responses to repeated sprint exercise under hypoxia among female team-sport athletes. Fifteen female athletes (age, 20.7±0.2 years; height, 159.6±1.7 cm; body weight, 55.3±1.4 kg) performed two exercise trials under either a hypoxic [HYPO; fract...

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Autores principales: Kasai, Nobukazu, Kojima, Chihiro, Goto, Kazushige
Formato: Online Artículo Texto
Lenguaje:English
Publicado: © Georg Thieme Verlag KG 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6225966/
https://www.ncbi.nlm.nih.gov/pubmed/30539121
http://dx.doi.org/10.1055/a-0628-6100
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author Kasai, Nobukazu
Kojima, Chihiro
Goto, Kazushige
author_facet Kasai, Nobukazu
Kojima, Chihiro
Goto, Kazushige
author_sort Kasai, Nobukazu
collection PubMed
description The present study determined metabolic and performance responses to repeated sprint exercise under hypoxia among female team-sport athletes. Fifteen female athletes (age, 20.7±0.2 years; height, 159.6±1.7 cm; body weight, 55.3±1.4 kg) performed two exercise trials under either a hypoxic [HYPO; fraction of inspired oxygen (F (i) O (2) ), 14.5%] or normoxic (NOR; F (i) O (2) , 20.9%) condition. The exercise consisted of two sets of 8×6-s maximal sprint (pedaling). The average power output was not significantly different between trials for set 1 ( P =0.89), but tended to be higher in the NOR trial for set 2 ( P =0.05). The post-exercise blood lactate concentrations were significantly higher in the HYPO trial than that in the NOR trial ( P <0.05). Exercise significantly increased serum growth hormone (GH) and cortisol concentrations ( P <0.01 for both hormones), with no difference between the trials. In conclusion, repeated short-duration sprints interspaced with 30-s recovery periods in moderate hypoxia caused further increase in blood lactate compared with the same exercise under normoxic conditions among female team-sport athletes. However, exercise-induced GH and cortisol elevations or power output during exercise were not markedly different regardless of the different levels of inspired oxygen.
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spelling pubmed-62259662018-12-11 Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes Kasai, Nobukazu Kojima, Chihiro Goto, Kazushige Sports Med Int Open The present study determined metabolic and performance responses to repeated sprint exercise under hypoxia among female team-sport athletes. Fifteen female athletes (age, 20.7±0.2 years; height, 159.6±1.7 cm; body weight, 55.3±1.4 kg) performed two exercise trials under either a hypoxic [HYPO; fraction of inspired oxygen (F (i) O (2) ), 14.5%] or normoxic (NOR; F (i) O (2) , 20.9%) condition. The exercise consisted of two sets of 8×6-s maximal sprint (pedaling). The average power output was not significantly different between trials for set 1 ( P =0.89), but tended to be higher in the NOR trial for set 2 ( P =0.05). The post-exercise blood lactate concentrations were significantly higher in the HYPO trial than that in the NOR trial ( P <0.05). Exercise significantly increased serum growth hormone (GH) and cortisol concentrations ( P <0.01 for both hormones), with no difference between the trials. In conclusion, repeated short-duration sprints interspaced with 30-s recovery periods in moderate hypoxia caused further increase in blood lactate compared with the same exercise under normoxic conditions among female team-sport athletes. However, exercise-induced GH and cortisol elevations or power output during exercise were not markedly different regardless of the different levels of inspired oxygen. © Georg Thieme Verlag KG 2018-08-22 /pmc/articles/PMC6225966/ /pubmed/30539121 http://dx.doi.org/10.1055/a-0628-6100 Text en https://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.
spellingShingle Kasai, Nobukazu
Kojima, Chihiro
Goto, Kazushige
Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes
title Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes
title_full Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes
title_fullStr Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes
title_full_unstemmed Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes
title_short Metabolic and Performance Responses to Sprint Exercise under Hypoxia among Female Athletes
title_sort metabolic and performance responses to sprint exercise under hypoxia among female athletes
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6225966/
https://www.ncbi.nlm.nih.gov/pubmed/30539121
http://dx.doi.org/10.1055/a-0628-6100
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