Document Detail

Strenuous exercise during pregnancy: is there a limit?
MedLine Citation:
PMID:  22939718     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: The purpose of this study was to evaluate fetal responses to strenuous exercise in physically active and inactive women.
STUDY DESIGN: Forty-five healthy women (15 who were nonexercisers, 15 who were regularly active, 15 who were highly active) underwent a peak treadmill test at 28 weeks' gestation to 32 weeks 6 days' gestation. Fetal well-being (umbilical artery Doppler indices, fetal heart tracing/rate, biophysical profile [BPP]) was evaluated before and after exercise. Uterine artery Doppler scans were also obtained.
RESULTS: Umbilical and uterine artery Doppler indices were similar among activity groups and did not change with exercise (P > .05). BPP and fetal heart tracings were reassuring in all groups. However, subgroup analyses showed transient fetal heart rate decelerations after exercise and elevated umbilical and uterine artery Doppler indices in 5 highly active women. After this, BPP and fetal heart tracings were reassuring.
CONCLUSION: Overall fetal well-being is reassuring after short-duration, strenuous exercise in both active and inactive pregnant women. A subset of highly active women experienced transient fetal heart rate decelerations and Doppler changes immediately after exercise. Athletes may push beyond a threshold intensity at which fetal well-being may be compromised. However, potential impact on neonatal outcomes is unknown.
Linda M Szymanski; Andrew J Satin
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2012-07-20
Journal Detail:
Title:  American journal of obstetrics and gynecology     Volume:  207     ISSN:  1097-6868     ISO Abbreviation:  Am. J. Obstet. Gynecol.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-09-03     Completed Date:  2012-11-13     Revised Date:  2013-09-03    
Medline Journal Info:
Nlm Unique ID:  0370476     Medline TA:  Am J Obstet Gynecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  179.e1-6     Citation Subset:  AIM; IM    
Copyright Information:
Copyright © 2012 Mosby, Inc. All rights reserved.
Division of Maternal-Fetal Medicine, Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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MeSH Terms
Exercise / physiology*
Exercise Test
Fetus / physiology*
Heart Rate, Fetal
Ultrasonography, Prenatal
Umbilical Arteries / physiology,  ultrasonography
Uterine Artery / ultrastructure
Grant Support

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

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