Document Detail


Maximal inspiratory pressure following maximal exercise in trained and untrained subjects.
MedLine Citation:
PMID:  2287259     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Previous investigators have demonstrated that 5-10 min of fatiguing exercise would lead to respiratory muscle fatigue in normal subjects. The purpose of this study was to determine if there was a differential inspiratory pressure response to maximal cycle ergometer exercise in trained and untrained subjects. Six highly trained cross country skiers and five untrained college students were studied prior to and 10, 60, and 120 s postexercise (incremental VO2max to exhaustion). On each occasion, maximal inspiratory pressure (MIP) was measured at the mouth from residual volume. Prior to exercise, the two groups had similar MIP values. After exercise, the sedentary subjects experienced significant decreases in MIP compared to the preexercise values. These decreases averaged 10%, 17%, and 13% at 10, 60, and 120 s postexercise, respectively. The skiers, on the other hand, showed no evidence of a decrease in MIP postexercise, with the postexercise values being slightly, but not significantly, higher than the preexercise values. From these results, we conclude that maximal exercise results in inspiratory muscle dysfunction in normal subjects but not in athletes training at or near elite levels. Thus, it appears that endurance exercise training induces an adaptive change in the inspiratory muscles that protects them from the acute loss of strength seen following exercise in normal subjects.
Authors:
J R Coast; P S Clifford; T W Henrich; J Stray-Gundersen; R L Johnson
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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:  22     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1990 Dec 
Date Detail:
Created Date:  1991-03-22     Completed Date:  1991-03-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  811-5     Citation Subset:  IM; S    
Affiliation:
Elouise Beard Smith Human Performance Laboratory, Texas A&M University, College Station 77843.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Exercise Test
Humans
Inspiratory Capacity / physiology*
Physical Endurance / physiology
Physical Fitness / physiology*
Residual Volume / physiology
Respiratory Muscles / physiology*
Skiing*

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


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