Document Detail

Respiratory and metabolic responses to endurance cycle exercise in pregnant and postpartum women.
MedLine Citation:
PMID:  9630025     Owner:  NLM     Status:  MEDLINE    
This study was designed to determine whether endurance cycling responses in pregnancy differ from those postpartum. We studied 16 women longitudinally at approximately 32 wk pregnancy and approximately 10 wk postpartum. We measured heart rate (HR), O2 uptake (VO2), CO2 output (VCO2), minute ventilation VE and plasma concentrations of substrates and of catecholamines at rest, during maximal testing, and during approximately 35-40 min of cycling at approximately 70-75% VO2peak. Endurance exercise time and power were 37.6+/-1.0 min and 124+/-8 W in pregnancy, similar to values observed postpartum. HR and respiratory responses near the end of endurance exercise were also unaffected by gestation, with pregnancy values of 173+/-3 bpm, 1.87+/-0.07 L/min VO2, and 1.68+/-0.07 L/min VCO2, except that VE at 70.0+/-3.5 L/min was 14% higher than postpartum; plasma concentrations of free fatty acids (404+/-62 micromol/L), glucose (3.34+/-0.17 mmol/L), and lactic acid (4.51+/-0.50 mmol/L) were lower than postpartum by 9, 24, and 19%, respectively; catecholamine concentrations were not different from those determined postpartum. We conclude that pregnant women are equally capable as are postpartum women to perform approximately 40 min of cycling at 70-75% VO2peak, and that the physiologic responses to endurance exercise are largely independent of gestation.
F K Lotgering; W E Spinnewijn; P C Struijk; F Boomsma; H C Wallenburg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of sports medicine     Volume:  19     ISSN:  0172-4622     ISO Abbreviation:  Int J Sports Med     Publication Date:  1998 Apr 
Date Detail:
Created Date:  1998-08-21     Completed Date:  1998-08-21     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  193-8     Citation Subset:  IM    
Department of Obstetrics and Gynecology, Erasmus University School of Medicine and Health Sciences, Rotterdam, The Netherlands.
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MeSH Terms
Blood Glucose / metabolism
Catecholamines / blood
Energy Metabolism / physiology*
Exercise Test*
Fatty Acids, Nonesterified / blood
Heart Rate / physiology
Lactic Acid / blood
Longitudinal Studies
Physical Endurance / physiology*
Postpartum Period / physiology*
Pregnancy / physiology*
Pulmonary Gas Exchange / physiology*
Reference Values
Reg. No./Substance:
0/Blood Glucose; 0/Catecholamines; 0/Fatty Acids, Nonesterified; 50-21-5/Lactic Acid

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

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