Document Detail


Comparison of exhaled nitric oxide and cardiorespiratory indices between nasal and oral breathing during submaximal exercise in humans.
MedLine Citation:
PMID:  9504133     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In order to examine the origin and role of nitric oxide (NO) in exhaled air during exercise, exhaled NO outputs of 8 healthy human subjects were compared using different breathing methods, through the mouth or nose, at two intensities of bicycle exercise. The concentration of NO in the exhaled air and ventilatory gas exchange variables were measured by a chemiluminescence analyzer and a mixing chamber method, respectively. The concentration and total output of NO in the expired air was significantly higher under nasal breathing than under oral breathing for both exercise intensities, whereas no significant difference was observed in cardiorespiratory variables between them. NO output increased significantly when exercise intensity was increased from unloaded (0 W) to 60 W under nasal breathing, but not under oral breathing. A negative correlation among subjects was found between NO output and minute ventilation in both breathing methods only for unloaded exercise. Data indicate that nasal airways have a large contribution, at least 50% of total NO output in the exhaled air during nasal breathing, but this nasal NO may have no further modulation on respiratory function during submaximal exercise by healthy humans.
Authors:
Y Yasuda; T Itoh; M Miyamura; H Nishino
Related Documents :
17523043 - Resting positions of vergence and their relation to asthenopic complaints.
22253983 - Whey protein ingestion activates mtor-dependent signalling after resistance exercise in...
12587023 - Analyzing defects in the caenorhabditis elegans nervous system using organismal and cel...
Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  The Japanese journal of physiology     Volume:  47     ISSN:  0021-521X     ISO Abbreviation:  Jpn. J. Physiol.     Publication Date:  1997 Oct 
Date Detail:
Created Date:  1998-03-19     Completed Date:  1998-03-19     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  2985184R     Medline TA:  Jpn J Physiol     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  465-70     Citation Subset:  IM; S    
Affiliation:
Research Center of Physical Fitness, Sports and Health, Toyohashi University of Technology, Japan.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Breath Tests
Carbon Dioxide / metabolism
Exercise / physiology*
Heart Rate / physiology
Hemodynamics / physiology
Humans
Least-Squares Analysis
Male
Middle Aged
Mouth Mucosa / metabolism
Nasal Cavity / physiology
Nitric Oxide / metabolism*
Oxygen Consumption / physiology
Reference Values
Respiration / physiology*
Respiratory Transport
Chemical
Reg. No./Substance:
10102-43-9/Nitric Oxide; 124-38-9/Carbon Dioxide

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


Previous Document:  Functional organization of chromaffin cells and cholinergic synaptic transmission in rat adrenal med...
Next Document:  Effects of spaceflight on enzyme activities and ultrastructure of fast-type skeletal muscles of rats...