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Heart Rate Variability Patterns Reflect Yoga Intervention in Chronically Stressed Pregnant Women: A Quasi-Randomized
Marlene J E Mayer1, Nicolas B Garnier2, Clara Becker1
1Department of Obstetrics and Gynecology, TUM University Hospital, Technical University of Munich, Arcisstrasse 21, D-80333 Munich, Germany.
Prenatal Yoga may positively influence maternal autonomic regulation during pregnancy. This study found Yoga restructured heart rate variability (HRV) complexity in stressed pregnant women, suggesting benefits for maternal well-being.
Area of Science:
- Neuroscience
- Psychology
- Physiology
Background:
- Prenatal stress (PS) negatively impacts offspring neurodevelopment.
- Heart rate variability (HRV) complexity reflects maternal autonomic regulation.
- Mind-body interventions like Yoga may influence maternal HRV.
Purpose of the Study:
- To investigate the effect of Hatha Yoga on HRV complexity in chronically stressed pregnant women.
- To explore changes in HRV metrics across pregnancy in response to Yoga.
- To assess the utility of advanced HRV analysis for detecting intervention effects.
Main Methods:
- Quasi-randomized controlled trial with 28 stressed pregnant women.
- Yoga group (n=14) vs. standard care group (n=14).
- ECG recordings analyzed using 94 HRV metrics, PCA, and a unified HRV index.
Main Results:
- HRV metric relationships dynamically changed throughout pregnancy.
- PCA loadings shifted from frequency to complexity measures in late gestation.
- A significant time x group interaction (p=0.041) indicated Yoga's effect on HRV restructuring.
Conclusions:
- Hatha Yoga appears to restructure HRV signal-analytical domains during pregnancy.
- Advanced HRV analysis frameworks are valuable for future intervention trials.
- Yoga may offer a beneficial mind-body intervention for maternal autonomic regulation.
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