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Moderate intensity aerobic exercise during pregnancy and 1-month infant Morphometry
Samantha M McDonald1, Christy Isler2, Kelley Haven2
1Department of Foundational Sciences and Research, East Carolina University (ECU), Greenville, North Carolina, USA.
Birth Defects Research
|February 1, 2021
Summary
Prenatal aerobic exercise significantly reduced neonatal skinfold thickness and body fat percentage at one month. This exercise intervention may help prevent early childhood obesity.
Area of Science:
- Obstetrics and Gynecology
- Neonatal Health
- Exercise Physiology
Background:
- Prenatal maternal health significantly influences neonatal outcomes.
- Childhood obesity is a growing public health concern with early postnatal origins.
- The impact of supervised prenatal exercise on neonatal morphometry requires further investigation.
Purpose of the Study:
- To assess the effects of a supervised, prenatal aerobic exercise intervention on neonatal morphometry at one month of age.
- To determine if prenatal exercise influences neonatal weight, skinfold thickness, circumferences, and fat-free mass.
- To explore the potential of prenatal exercise as a strategy for preventing early postnatal overweight or obesity.
Main Methods:
- Secondary data analysis from a randomized controlled trial (RCT) involving pregnant women (n=128) from 2015-2018.
- Participants were assigned to a moderate-intensity aerobic exercise group (n=68) or a control group (light stretching/breathing, n=60).
- Neonatal morphometry (weight, skinfold thickness, circumferences, fat-free mass) was measured at 1 month; ANCOVA was used for intention-to-treat (ITT) and per-protocol analyses.
Main Results:
- Significant between-group differences were observed for neonatal skinfold thickness (ITT: 20.0 mm vs. 22.2 mm; p=.04; per protocol: 19.8 mm vs. 22.3 mm; p=.03).
- Neonatal percent body fat showed a significant difference in the per-protocol analysis (13.2% vs. 15.1%; p=.05).
- No significant differences were found for neonatal weight, abdominal/mid-upper arm circumferences, or fat-free mass between groups.
Conclusions:
- Supervised prenatal aerobic exercise positively impacts neonatal skinfold thickness and body fat percentage at one month postpartum.
- Adherence to recommended prenatal exercise levels (150 min/week, moderate-intensity) may be an effective strategy to mitigate the risk of neonatal overweight or obesity.
- Prenatal exercise interventions show promise for improving early neonatal body composition and potentially long-term metabolic health.
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