Document Detail


Cardiorespiratory effects of respiratory protective devices during exercise in well-trained men.
MedLine Citation:
PMID:  6539691     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of a filtering device, an air-line breathing apparatus and a self-contained breathing apparatus ( SCBA ) on pulmonary ventilation, oxygen consumption and heart rate were studied in 12 well-trained firemen aged 21-35 years. Their average maximal oxygen consumption (VO2 max) was 64.9 ml X min-1 X kg-1. Sequential tests without and with the respirator were performed on a treadmill. The continuous test contained five components, each of which lasted 5 min: sitting at rest, walking at 20%, 40%, and 60% of the individual VO2 max, and recovery sitting. During the higher submaximal work levels and recovery, ventilation, heart rate, and oxygen consumption in particular increased more with respirators than without them. At the highest work level the increments in oxygen consumption caused by the respirators were 13%, (8.7 ml X min-1 X kg-1), 7% (4.4 ml X min-1 X kg-1), and 20% (12.7 ml X min-1 X kg-1) of VO2 max. All three respirators hampered respiration, resulting in hypoventilation. The additional effort of breathing and the weight of the apparatus (15 kg with the SCBA ) increased the subjects' cardiorespiratory strain so clearly that the need for rest periods and the individual's work capacity when the respirators are worn must be carefully considered, particularly with the SCBA .
Authors:
V Louhevaara; T Tuomi; O Korhonen; J Jaakkola
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  52     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1984  
Date Detail:
Created Date:  1984-07-27     Completed Date:  1984-07-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  340-5     Citation Subset:  IM; S    
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MeSH Terms
Descriptor/Qualifier:
Adult
Heart / physiology*
Heart Rate
Humans
Male
Oxygen Consumption
Physical Exertion*
Protective Devices*
Respiration*
Respiratory Protective Devices*
Rest

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


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