Document Detail

Pulmonary gas exchange in athletes with exercise-induced hypoxaemia.
MedLine Citation:
PMID:  7500625     Owner:  NLM     Status:  MEDLINE    
Hypoxaemia that is induced by physical exercise (EIH) in some athletes, who are however capable of enduring intense muscolar work, is a phenomenon that has been known for some time. However, assumptions such as alveolar hypoventilation, veno-arterial shunt, limitation of diffusion, or mismarch of the VA/Q ratio, have not to date been able to exhaustively explain this phenomenon. In this study five athletes displaying exercise-induced hypoxaemia were evaluated by increasing-load exercise tests, as proposed by other authors, and by means of intermittent tests with supermaximal exercise steps (130% VO2 max) with breaks for incomplete recovery (3 min). The fundamental fact arising from our study is that the intermittent tests did not bring about hypoxaemia in the tests subjects. Analysis of the ventilator and metabolic parameters, of the alveolar pressure of the O2, and of the partial pressures of the CO2 in the arterial blood, all measured during the two different types of muscular exercise, lead to the belief that the different distribution of the pulmonary blood flow, which has been documented in highly trained athletes, plays a very important role in inducing EIH.
A Todaro; L M Leonardi; M Besi; P Faccini; F Sardella; C Menchinelli; C Gallozzi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  35     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  1995 Jun 
Date Detail:
Created Date:  1996-01-17     Completed Date:  1996-01-17     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  114-23     Citation Subset:  IM    
Department of Physiology and Biomechanics, Sport Science Institute, Rome, Italy.
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MeSH Terms
Adaptation, Physiological
Anoxia / physiopathology*
Bicycling / physiology*
Carbon Dioxide / blood
Exercise Test
Heart Rate
Hypoventilation / physiopathology
Muscle Contraction
Oxygen / blood
Oxygen Consumption
Partial Pressure
Physical Endurance
Pulmonary Alveoli / physiopathology
Pulmonary Circulation
Pulmonary Gas Exchange / physiology*
Tidal Volume
Ventilation-Perfusion Ratio
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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

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