Document Detail


Influence of supplemental oxygen on the physiological response to the PO2 aerobic exerciser.
MedLine Citation:
PMID:  3702649     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Acute physiological responses to the "PO2-Aerobic Exerciser" (AE), a partial rebreathing device designed to stimulate training at altitudes, were studied in seven healthy men [mean VO2max = 56.1 +@- 10.1 (SD) ml X kg-1 X min-1] who performed cycle ergometer exercise to exhaustion in three experimental situations: a control test (C) breathing normal atmosphere: a test with the device (AE); and a test with the AE air supplemented with oxygen (AEO2'). Arterial oxygen saturation at rest for C, AE, and AEO2' studies was 97 +/- 1, 95 +/- 2, and 97 +/- 1%, respectively (P less than 0.05 for C vs AE and AE vs AEO2'), while at exhaustion it was 95 +/- 1, 87 +/- 2, and 95 +/- 1%, respectively (P less than 0.05 for C vs AE and AE vs AEO2'). Maximum work rate decreased from a control value of 1738 +/- 184 kg X min-1 to 1371 +/- 147 kg X min-1 during AE and remained below control levels during AEO2'; 1554 +/- 110 kg X min-1 (P less than 0.05). Beyond 60% of maximum work rate during AE, inspired CO2 increased to 0.026 +/- 0.005. Mouth pressure swings of up to -19.2 +/- 10.2 and 12.7 +/- 5.7 cm H2O were recorded during AE. While the PO2 aerobic exerciser induced a hypoxic stress, the pertubation imposed was not explained fully by arterial oxygen desaturation. Other factors such as hypercapnia and a flow resistive increase in the work of breathing appear to have influenced work capacity during the use of the device.
Authors:
A D D'Urzo; F L Liu; A S Rebuck
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  18     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1986 Apr 
Date Detail:
Created Date:  1986-06-02     Completed Date:  1986-06-02     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  211-5     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Adult
Altitude*
Anoxia / physiopathology
Exercise Test
Humans
Male
Oxygen / blood*
Oxygen Consumption
Physical Education and Training*
Physical Exertion*
Chemical
Reg. No./Substance:
7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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