| Muscle energetics in short-term training during hypoxia in elite combination skiers. | |
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MedLine Citation:
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PMID: 7851364 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Four well-trained combination skiers were studied through pre- and post-training for the effects of short-term intermittent training during hypoxia on muscle energetics during submaximal exercise as measured by Phosphorus-31 nuclear magnetic resonance and maximal aerobic power (VO2max). The hypoxia and training in the cold was conducted in a hypobaric chamber and comprised 60-min aerobic exercise (at an intensity equivalent to the blood lactate threshold), using a cycle ergometer or a treadmill twice a day for 4, consecutive days at 5 degrees C, in conditions equivalent to an altitude of 2000 m (593 mm Hg). No change in VO2max was observed over the training period, while in the muscle energetics during submaximal exercise, the values of phosphocreatine/(phosphocreatine+inorganic phosphate) and intracellular pH were found to be significantly increased by training during hypoxia. During recovery, the time constant of phosphocreatine was found to have been significantly reduced [pre, 27.9 (SD 6.7) s; post, 22.5 (SD 4.7) s, P < 0.01]. The observed inhibition of phosphocreatine as well as that of intracellular pH changes after training during hypoxia and quicker recovery of phosphocreatine in submaximal exercise tests, may indicate improved oxidative capacity (i.e. a high adenosine 5'-triphosphate formation rate) despite the short-term hypoxia training. |
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Authors:
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S Kuno; M Inaki; K Tanaka; Y Itai; K Asano |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: European journal of applied physiology and occupational physiology Volume: 69 ISSN: 0301-5548 ISO Abbreviation: Eur J Appl Physiol Occup Physiol Publication Date: 1994 |
Date Detail:
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Created Date: 1995-03-13 Completed Date: 1995-03-13 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0410266 Medline TA: Eur J Appl Physiol Occup Physiol Country: GERMANY |
Other Details:
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Languages: eng Pagination: 301-4 Citation Subset: IM; S |
Affiliation:
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Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Altitude* Anoxia / metabolism* Blood Gas Analysis Cold Temperature Humans Hydrogen-Ion Concentration Intracellular Fluid / metabolism Lactates / blood Lactic Acid Magnetic Resonance Spectroscopy Muscle, Skeletal / metabolism* Physical Exertion / physiology* Skiing / physiology* |
| Chemical | |
Reg. No./Substance:
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0/Lactates; 50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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