Document Detail

Aerobic exercise for women during pregnancy.
MedLine Citation:
PMID:  16855953     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Physiological responses of the fetus (especially increase in heart rate) to single, brief bouts of maternal exercise have been documented frequently. Many pregnant women wish to engage in aerobic exercise during pregnancy but are concerned about possible adverse effects on the outcome of pregnancy.
OBJECTIVES: The objective of this review was to assess the effects of advising healthy pregnant women to engage in regular aerobic exercise (at least two to three times per week), or to increase or reduce the intensity, duration, or frequency of such exercise, on physical fitness, the course of labour and delivery, and the outcome of pregnancy.
SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (June 2005), MEDLINE (1966 to 2005 January Week 1), EMBASE (1980 to 2005 January Week 1), Conference Papers Index (earliest to 2005 January Week 1), contacted researchers in the field and searched reference lists of retrieved articles.
SELECTION CRITERIA: Acceptably controlled trials of prescribed exercise programs in healthy pregnant women.
DATA COLLECTION AND ANALYSIS: Both review authors independently assessed trial quality and extracted data. Study authors were contacted for additional information.
MAIN RESULTS: Eleven trials involving 472 women were included. The trials were small and not of high methodologic quality. Five trials reported significant improvement in physical fitness in the exercise group, although inconsistencies in summary statistics and measures used to assess fitness prevented quantitative pooling of results. Seven trials reported on pregnancy outcomes. A pooled increased risk of preterm birth (relative risk 1.82, 95% confidence interval (CI) 0.35 to 9.57) with exercise, albeit statistically nonsignificant, does not cohere with the absence of effect on mean gestational age (weighted mean difference +0.3, 95% CI -0.2 to +0.9 weeks), while the results bearing on growth of the fetus are inconsistent. One small trial reported that physically fit women who increased the duration of exercise bouts in early pregnancy and then reduced that duration in later pregnancy gave birth to larger infants with larger placentas.
AUTHORS' CONCLUSIONS: Regular aerobic exercise during pregnancy appears to improve (or maintain) physical fitness. Available data are insufficient to infer important risks or benefits for the mother or infant. Larger and better trials are needed before confident recommendations can be made about the benefits and risk of aerobic exercise in pregnancy.
M S Kramer; S W McDonald
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Publication Detail:
Type:  Journal Article; Meta-Analysis; Review     Date:  2006-07-19
Journal Detail:
Title:  The Cochrane database of systematic reviews     Volume:  -     ISSN:  1469-493X     ISO Abbreviation:  Cochrane Database Syst Rev     Publication Date:  2006  
Date Detail:
Created Date:  2006-07-20     Completed Date:  2006-10-16     Revised Date:  2013-06-28    
Medline Journal Info:
Nlm Unique ID:  100909747     Medline TA:  Cochrane Database Syst Rev     Country:  England    
Other Details:
Languages:  eng     Pagination:  CD000180     Citation Subset:  IM    
Faculty of Medicine, 1020 Pine Avenue West, Montreal, Quebec, Canada H3A 1A2.
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MeSH Terms
Exercise / physiology*
Physical Fitness
Pregnancy / physiology*
Pregnancy Outcome
Randomized Controlled Trials as Topic
Update Of:
Cochrane Database Syst Rev. 2002;(2):CD000180   [PMID:  12076383 ]

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