Abstract
The popularity of external nasal dilators has grown tremendously. Manufacturers claim their product may improve ventilatory dynamics, thereby improving exercise performance. However, to date no scientific studies have examined the dilator's effect on submaximal exercise performance. This study investigated the effects of external nasal dilators on metabolic and respiratory responses during submaximal exercise. Five subjects performed three, 20 minute submaximal (≅ 55% VO2 max) cycle exercise sessions consisting of a Breathe Right, placebo (tape), and control conditions. Subjects were blinded as to the purpose of the study by telling them 2 different dilators were being tested and with those strips applied with the subject's eyes closed. Open circuit spirometry, using a full-face fireman's mask, was used to collect metabolic and respiratory data. A one-way ANOVA for repeated measures was used to analyze the data with the following results obtained: Table Statistical analysis found no significant differences for any of the variables analyzed in this study. Therefore, it was concluded that the Breathe Right nasal dilators do not enhance submaximal exercise function.
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