Document Detail


Effects of acute exercise on inspiratory muscle strength and endurance in untrained women and men.
MedLine Citation:
PMID:  20842086     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
AIM: The purpose of this study was to determine if sex differences are present in exercise-induced inspiratory muscle function in untrained humans.
METHODS: Eight young untrained women (23.8 ± 1.5 y, VO2max = 33.7 ± 4.0 mL/kg/min) and men (26.1 ± 2.0 y, VO2max = 36.7 ± 1.2 mL/kg/min) performed high-intensity cycling exercise (80% WRmax) to exhaustion. Inspiratory muscle strength and endurance were assessed pre- and post-exercise by measuring maximal inspiratory pressure (PImax) and time to task failure during a constant-load breathing test (CLBT), respectively.
RESULTS: Relative intensity and time to exhaustion during high-intensity exercise was similar between women and men. Prior to exercise, PImax was similar between sexes. After exercise, women and men showed similar reductions in PImax (W: 140.4 ± 9.9 to 124.6 ± 6.7 cm H2O, P<0.05; M: 147.7 ± 10.2 to 128.1 ± 11.1 cm H2O, P<0.05). No sex difference was found in the magnitude change in PImax following exercise (W: 15.8 ± 7.9 vs. M: 19.6 ± 4.7 cm H2O). Time to task failure on the CLBT was reduced following exercise in women (360 ± 54 to 135 ± 29 s, P<0.05) and men (270 ± 36 to 150 ± 17 s, P<0.05). Women exhibited a greater reduction in time to task failure following exercise than men (W: 225 ± 55 vs. M: 120 ± 38 s, P=0.05).
CONCLUSION: These data demonstrate that women exhibit a greater reduction in inspiratory muscle endurance following an acute bout of high-intensity exercise than men.
Authors:
J U Gonzales; J S Williams
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  50     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  268-73     Citation Subset:  IM    
Affiliation:
Texas Tech University, Lubbock, TX, USA - jw88@txstate.edu.
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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