Influence of maternal physical activity on infant's body composition

Area of Science:

• Obstetrics and Gynecology
• Neonatal Health
• Exercise Physiology

Background:

• Physical activity (PA) during pregnancy may mitigate neonatal adiposity, a key indicator of future metabolic health issues.
• Understanding the relationship between maternal exercise intensity and offspring body composition is crucial for prenatal care.

Purpose of the Study:

• To investigate the association between the intensity of maternal physical activity during pregnancy and the resulting neonatal body composition.
• To determine how different levels and types of physical activity (moderate vs. vigorous) influence neonatal outcomes.

Main Methods:

• Maternal physical activity was objectively measured using accelerometry at 17 and 36 weeks of gestation.
• Neonatal body composition was assessed post-delivery using dual-energy X-ray absorptiometry.
• Multivariate regression analyses examined associations between maternal PA (moderate PA [MPA], vigorous PA [VPA]) and neonatal outcomes.

Main Results:

• Vigorous physical activity (VPA) at any point during pregnancy was linked to decreased birthweight (BW).
• VPA specifically at 17 weeks of gestation was associated with reduced neonatal adiposity (fat percentage).
• Moderate physical activity (MPA) at 36 weeks was linked to increased neonatal lean mass. High MPA combined with VPA at 17 weeks significantly reduced neonatal bone mineral content (BMC) and BW.

Conclusions:

• The intensity of maternal exercise during pregnancy plays a significant role in modulating neonatal body composition.
• Further research is needed to ascertain the long-term health implications of reduced birthweight, adiposity, and bone mineral content associated with vigorous physical activity.