Document Detail

Impact of pregnancy and obesity on cardiorespiratory responses during weight-bearing exercise.
MedLine Citation:
PMID:  19539787     Owner:  NLM     Status:  MEDLINE    
The present study is the first to compare the cardiorespiratory responses during progressive weight-bearing treadmill exercise in normal-weight non-pregnant (NP, n=14), normal-weight pregnant (PG, n=20) and obese pregnant (PGOB, n=20) women. Exercise duration and peak treadmill speed were lower in PG (23.9+/-4.9 min; 1.6+/-0.2m/s; P<0.001) compared to NP (33.7+/-4.9 min; 2.0+/-0.2m/s) and were further reduced in PGOB (19.6+/-2.8 min; 1.4+/-0.1m/s; P<0.001) indicating a performance limitation to exercise. Ventilation in response to exercise was increased in PG (49.4+/-6.6L/min) compared to NP (39.8+/-5.4 L/min, at 100W; p<0.05) women, and was further augmented by obesity (56.7+/-9.3 L/min, at 100W; p<0.05 versus PG) secondary to an elevated metabolic cost of exercise as indicated by no further increase in .V(E)/.V(CO2) and .V(E)/.V(O2) in PGOB compared to PG women. The normal augmentation of heart rate observed in PG during exercise was not further increased by obesity at standardized sub-maximal work rates.
Margie H Davenport; Craig D Steinback; Michelle F Mottola
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-06-17
Journal Detail:
Title:  Respiratory physiology & neurobiology     Volume:  167     ISSN:  1878-1519     ISO Abbreviation:  Respir Physiol Neurobiol     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-07-22     Completed Date:  2009-09-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101140022     Medline TA:  Respir Physiol Neurobiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  341-7     Citation Subset:  IM    
Exercise and Pregnancy Laboratory, School of Kinesiology, Faculty of Health Sciences, The University of Western Ontario, London, Ontario, Canada.
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MeSH Terms
Anaerobic Threshold / physiology
Exercise / physiology*
Hemodynamics / physiology*
Metabolism / physiology
Obesity / physiopathology*
Pregnancy / physiology*
Respiratory Mechanics / physiology*
Walking / physiology
Weight-Bearing / physiology*

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

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