| Exercise respiratory pattern in elite cyclists and sedentary subjects. | |
| | |
MedLine Citation:
|
PMID: 6656560 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
We investigated the breath-by-breath pattern of ventilatory response to bicycle exercise in seven elite male cyclists (VO2max = 71.7 ml X min-1 X kg-1) and ten sedentary males (VO2max = 47.3 ml X min-1 X kg-1) to analyze differences in breathing patterns between individuals with normal and high exercise ventilations (VE). The mean VEmax of the athletes (ATH) exceeded that of the sedentary subjects (SED) by 34.6% (183 vs 136 l X min-1) and was proportional to the difference in VCO2max between the groups (5.9 vs 4.23 l X min-1). The ATH used an average of 89% of their 15-s maximum voluntary ventilation (MVV) during maximum exercise while SED used only 71%. The ATH had slightly, but not significantly, larger vital capacity (FVC). Both groups used about half of their FVC at maximum tidal volume (VT), VT was 47% and 49% of FVC in ATH and SED, respectively. The ATH achieved the higher VEmax by achieving a greater increase in respiratory frequency (63/min vs 49/min), which was accomplished by significant decreases in both inspiratory (T1) and, more importantly, expiratory (TE) time. There was a tendency for athletes to have a somewhat more regular breathing pattern. Both 1/T1 and mean inspiratory flow (VT/T1) were highly correlated with VE, but there were no differences in these relationships between ATH and SED. Highly-conditioned athletes, therefore, respond to the increased demand for CO2 elimination by utilizing a higher respiratory frequency achieved through a reduction of both inspiratory and expiratory duration, but not by utilizing a larger tidal volume (i.e., as percent FVC) than less fit individuals. |
| | |
Authors:
|
L J Folinsbee; E S Wallace; J F Bedi; S M Horvath |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Medicine and science in sports and exercise Volume: 15 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 1983 |
Date Detail:
|
Created Date: 1984-02-22 Completed Date: 1984-02-22 Revised Date: 2008-11-21 |
Medline Journal Info:
|
Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 503-9 Citation Subset: IM; S |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adult Bicycling* Humans Male Oxygen Consumption Physical Exertion* Physical Fitness Respiration* Sports* Vital Capacity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Physiological adjustments to higher- or lower-intensity exercise in elders.
Next Document: A comparison of the training responses to aerobic dance and jogging in college females.