Document Detail

Influence of changes in nasal ventilation on estimated workload during submaximal field running.
MedLine Citation:
PMID:  12094118     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Breathe Right (BR) external nasal dilator have become increasingly popular over the past few years, however, the physiological basis for using BR remains unclear. We have examined whether alteration in nasal ventilation would influence the metabolic cost of submaximal running. METHODS: Metabolic cost was estimated in 10 male endurance triathletes by measuring heart rate (HR) and exercise perception by measuring the rate of perceived exertion (RPE) during submaximal field running. The protocol consisted of 5 min of running at 80% of their maximal aerobic velocity (MAV(f), previously determined under field conditions) for three randomised experimental conditions, separated by a 10 min rest. The conditions were normal nasal ventilation (N), no nasal ventilation (using a nose clip) (NC) and with a BR. RESULTS: Running with the BR or with NC did not significantly influence HR (N: 173+/-7, BR: 173+/-8, NC: 172+/-7 beat x min(-1); F=0.01, p=0.99) or RPE (N: 12.1+/-1.7, BR: 11.8+/-1.9, NC: 13.2+/-0.8; F=1.88, p=0.18). We conclude that alteration in nasal ventilation produced by using BR or NC do not influence HR or RPE in a group of triathletes running 5 min at 80% of MAV(f). CONCLUSIONS: The present study tended to demonstrate that both nasal ventilation would not influence the total metabolic cost, and that the BR device is not advantageous during high intensity exercise.
M Bourdin; P Sallet; A-B Dufour; J-R Lacour
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  42     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2002 Sep 
Date Detail:
Created Date:  2002-07-02     Completed Date:  2002-12-09     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  295-9     Citation Subset:  IM    
Laboratoire de Physiologie de l'Exercice, GIP Exercice, Faculté de Médecine Lyon-Sud, Oullins Cedex, France.
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MeSH Terms
Dilatation / instrumentation
Energy Metabolism / physiology*
Heart Rate / physiology
Lactates / blood
Nasal Cavity / physiology*
Oxygen Consumption / physiology
Physical Exertion / physiology
Running / physiology*
Reg. No./Substance:

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