Doppler sonographic evaluation of exercise-induced blood flow velocity and waveform changes in fetal, uteroplacental and large maternal vessels in pregnant women

Baumann, Hans; Huch, A.; Huch, R.

doi:10.1515/jpme.1989.17.4.279

Cited by 23 publications

(13 citation statements)

References 32 publications

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“…Animal studies suggest decreased uterine blood flow during physical activity (5-8), but studies in women are inconclusive (9-11). Several studies have reported an increase in fetal heart rate during maternal physical activity (12-16), although changes in fetal heart rate may occur in response to maternal epinephrine and may not reflect a decrease in oxygen (12-15).…”

Section: Introductionmentioning

confidence: 99%

A Prospective Study of the Association Between Vigorous Physical Activity During Pregnancy and Length of Gestation and Birthweight

Jukic

Evenson

Daniels

et al. 2011

Matern Child Health J

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Summary Current U.S. pregnancy-related physical activity recommendations do not provide specific guidance for vigorous intensity activity. Our objective was to examine the associations between vigorous physical activity during pregnancy and length of gestation and birthweight. Women were recruited before 10 weeks gestation. At 13-16 weeks gestation, participants reported the type, frequency, and duration of their typical weekly vigorous physical activities. Activity domains included recreational, occupational, household, and child/adult care. Infant birth date was obtained from medical or vital records; if unavailable, self-report was used. Birthweight (from vital records) was studied among term births. We analyzed gestational age among 1,647 births using discrete-time survival analysis. We used logistic and linear regression to analyze preterm birth (birth at <37 weeks) and birthweight, respectively. Vigorous recreational activity was associated with longer gestation (any vs. none, hazard ratio (HR) [95% CI]: 0.85 [0.70, 1.05]) and we did not detect any dose-response association. Higher frequency of vigorous recreational activity sessions (adjusted for total volume of activity) was associated with a decreased odds of preterm birth (≥ 4 sessions/week vs. 0 or 1, OR [95% CI]: 0.08 (0.006, 1.0). Birthweight was not associated with physical activity measures. In summary, vigorous physical activity does not appear to be detrimental to the timing of birth or birthweight. Our data support a reduced risk of preterm birth with vigorous recreational activity, particularly with increased frequency of recreational activity sessions. Future studies should investigate the components of physical activity (i.e. intensity, duration, and frequency) in relation to birth outcomes.

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Section: Introductionmentioning

confidence: 99%

A Prospective Study of the Association Between Vigorous Physical Activity During Pregnancy and Length of Gestation and Birthweight

Jukic

Evenson

Daniels

et al. 2011

Matern Child Health J

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“…Several previous studies have investigated the influence of maternal exercise on the umbilical artery waveforms and Doppler indices (PI, RI or S/D). Most of these found no change 10±14 , whereas others reported decreased Doppler indices as a result of exercise 8,9 . Methodological differences should be considered when comparing our study with others.…”

Section: Discussionmentioning

confidence: 97%

The influence of maternal exercise on placental blood flow measured by Simultaneous Multigate Spectral Doppler Imaging (SM‐SDI)

Feiner

Weksler

Ohel

et al. 2000

Ultrasound in Obstet & Gyne

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Objective To evaluate the effect of maternal isometric exercise on the placental blood flow as reflected by the velocimetric indices PI and RI derived from placental arteries.Subjects Thirty-four healthy women with normal singleton pregnancies between 22 and 35 weeks of gestation.Methods All subjects underwent an isometric handgrip exercise test. Maternal blood pressure and heart rate together with placental PI and RI were measured at rest, during the exercise and in the post-exercise recovery phase. All Doppler measurements were obtained using the Simultaneous Multigate Spectral Doppler Imaging (SM-SDI) technique, a new ultrasound modality that enables a Doppler study of multiple locations to take place within a very short time.

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“…Historically, exercise during pregnancy has been a cause of concern because it could potentially challenge the homeostasis of the maternal-fetal unit, and thus it might adversely affect the course and outcome of pregnancy 1–3. Particular caution should theoretically be placed on exercise performed during the last trimester of pregnancy, which is necessary for the maturation of the fetal lungs and other organs.…”

mentioning

confidence: 99%

“…Several studies evaluated the effects of a single bout of dynamic, submaximal exercise (usually, cycle-ergometry at ≤80% age-predicted maximum heart rate (HR max )) on the vascular resistance of the umbilical3–13 or fetal cerebral circulation in non-athletic, healthy women during the last trimester of uncomplicated pregnancy 4 13. They did not observe significant exercise-induced changes in umbilical perfusion,4–7 9–13 or even improvements due to decreased vascular resistance were reported 8.…”

mentioning

confidence: 99%

Does exercise training during pregnancy influence fetal cardiovascular responses to an exercise stimulus? Insights from a randomised, controlled trial

et al. 2009

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In this study, the effects of maternal physical activity level on several fetal haemodynamic parameters such as pulsatility index of the fetal middle cerebral and umbilical arteries and cerebral-to-fetal ratio, as well as on fetal heart rate responses to one bout of moderate exercise (20 min cycle-ergometry at approximately 60% of age-predicted maximum heart rate) during the third pregnancy trimester were assessed. 26 Sedentary and 26 physically active gravidae aged 29 (3) and 30 (2) years, respectively, were studied. Maternal exercise did not have a deleterious effect on fetal haemodynamics (particularly, cerebral-to-fetal ratio remained within normal limits with exercise). Overall, maternal training status did not influence the fetal cardiovascular variables studied.

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Doppler sonographic evaluation of exercise-induced blood flow velocity and waveform changes in fetal, uteroplacental and large maternal vessels in pregnant women

Cited by 23 publications

References 32 publications

A Prospective Study of the Association Between Vigorous Physical Activity During Pregnancy and Length of Gestation and Birthweight

A Prospective Study of the Association Between Vigorous Physical Activity During Pregnancy and Length of Gestation and Birthweight

The influence of maternal exercise on placental blood flow measured by Simultaneous Multigate Spectral Doppler Imaging (SM‐SDI)

Does exercise training during pregnancy influence fetal cardiovascular responses to an exercise stimulus? Insights from a randomised, controlled trial

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