Document Detail


Nasal dilator strips delay the onset of oral route breathing during exercise.
MedLine Citation:
PMID:  10638341     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The external nasal dilator strip (ENDS) device (Breathe Right, CNS Inc., Chanhassen, MN, USA) has been adopted by athletes to promote nasal route breathing during exercise. We studied the influence of ENDS on the switching point from nasal-only to oro-nasal breathing during exercise in 4 healthy men (age 25 +/- 2 yrs, mean +/- SEM) and 5 women (age 30 +/- 5 yrs). Resting inspiratory nasal airflow resistance decreased from 0.33 +/- 0.02 kPa/L/s without ENDS to 0.22 +/- 0.01 kPa/L/s with ENDS (p < 0.01). ENDS delayed the onset of oro-nasal breathing such that the time from commencement of exercise to switching increased by 15.2%, and maximum levels of inspiratory nasal airflow and ventilation achieved prior to switching increased by 14.9% and 14.3%, respectively (all p < 0.05). We conclude that, in normal healthy subjects, ENDS does promote nasal route breathing during exercise, but any delay in the onset of oral route breathing during a progressive exercise task appears relatively small.
Authors:
M Seto-Poon; T C Amis; J P Kirkness; J R Wheatley
Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Canadian journal of applied physiology = Revue canadienne de physiologie appliquée     Volume:  24     ISSN:  1066-7814     ISO Abbreviation:  Can J Appl Physiol     Publication Date:  1999 Dec 
Date Detail:
Created Date:  2000-02-01     Completed Date:  2000-02-01     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9306274     Medline TA:  Can J Appl Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  538-47     Citation Subset:  IM; S    
Affiliation:
School of Science, Univ. of Western Sydney-Nepean, Kingswood, NSW, Australia.
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MeSH Terms
Descriptor/Qualifier:
Adult
Airway Resistance / physiology
Dilatation / instrumentation
Equipment Design
Exercise Test
Female
Humans
Inhalation / physiology
Male
Mouth / physiology*
Nose / physiology*
Physical Exertion / physiology*
Pulmonary Ventilation / physiology*
Respiration*
Single-Blind Method
Time Factors
Work of Breathing / physiology

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


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