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Published on: February 14, 2021
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Influence of physical exercise on baroreceptor sensitivity during pregnancy
R E Carpenter1, S J Emery2, O Uzun3
1a College of Engineering, Swansea University , Swansea , UK.
Summary
Regular antenatal exercise exaggerated reductions in baroreceptor sensitivity (BRS) and heart rate variability (HRV) during pregnancy. This suggests exercise may diminish parasympathetic activity in expectant mothers.
Area of Science:
- Physiology
- Cardiovascular Health
- Pregnancy Research
Background:
- Baroreceptor sensitivity (BRS) is crucial for regulating blood pressure during pregnancy.
- The effects of antenatal exercise on maternal BRS are not well understood.
Purpose of the Study:
- To investigate the influence of supervised weekly exercise on maternal BRS.
- To assess the impact of posture and calculation methods on antenatal BRS measurements.
Main Methods:
- 81 healthy pregnant women were randomized into exercise and control groups.
- Cardiovascular parameters were monitored throughout pregnancy and postpartum.
- BRS was calculated using both "sequence" and "beat-to-beat" methods.
Main Results:
- BRS progressively decreased in all participants, with greater reductions in the exercise group.
- Heart rate variability (HRV) also decreased with gestation, more significantly in the exercise group.
- The "beat-to-beat" method showed earlier training-induced BRS reduction than the "sequence" method.
Conclusions:
- Weekly antenatal exercise intensifies the decline in BRS and HRV during pregnancy.
- This effect is likely associated with reduced parasympathetic activity.
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