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Related Experiment Videos

Maximal exercise testing in late gestation: fetal responses.

A MacPhail1, G A Davies, R Victory

  • 1School of Physical and Health Education, Queen's University, Kingston, Ontario, Canada.

Obstetrics and Gynecology
|September 27, 2000
PubMed
Summary

Maximal maternal exercise in late pregnancy caused minor fetal heart rate (FHR) changes. Brief, maximal exertion appears safe for fetuses appropriate for gestational age, with no adverse neonatal outcomes observed.

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Area of Science:

  • Obstetrics and Gynecology
  • Fetal Physiology
  • Exercise Science

Background:

  • Maternal exercise during pregnancy is generally encouraged.
  • The effects of maximal exertion in late gestation on fetal well-being require further investigation.

Purpose of the Study:

  • To assess fetal heart rate (FHR) responses to maximal maternal exercise in the third trimester.
  • To evaluate the safety of maximal maternal exertion in uncomplicated pregnancies.

Main Methods:

  • Twenty-three active pregnant women underwent maximal exercise testing on a cycle ergometer.
  • Fetal heart rate (FHR) was monitored and analyzed using established guidelines.
  • Statistical analysis included t tests, ANOVA, and chi-squared tests.

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Main Results:

  • A transient increase in baseline FHR was observed post-exercise.
  • Fetal heart rate accelerations decreased, and variability was reduced post-exercise.
  • No abnormal neonatal outcomes were reported; one fetus with undiagnosed growth restriction showed bradycardia.

Conclusions:

  • Maximal maternal exercise in late gestation results in minimal FHR alterations.
  • Brief maximal exertion is likely safe for fetuses appropriate for gestational age.
  • Further research may be warranted for fetuses with suspected growth abnormalities.