Maternal resistance exercise increases infant energy expenditure.

Area of Science:

• Exercise Physiology
• Infant Metabolism
• Maternal Health

Background:

• Maternal obesity is linked to decreased infant energy expenditure, increasing adiposity risk.
• The specific impact of maternal exercise type (aerobic vs. resistance) on infant energy expenditure remains unclear.

Purpose of the Study:

• To investigate the effects of supervised maternal exercise modes (aerobic, resistance, combination) on infant energy expenditure.
• To determine if maternal exercise type influences infant metabolic rate and body composition.

Main Methods:

• Infant resting energy expenditure was measured at one month of age.
• Infants were exposed to different maternal exercise interventions during gestation: aerobic, resistance, or combination exercise.

Main Results:

• Infants exposed to maternal resistance exercise demonstrated over 35% higher energy expenditure compared to aerobic or no exercise groups.
• Infant energy expenditure and lean mass correlated with maternal blood lipids, independent of exercise type.
• Maternal resistance exercise led to a discrepancy between measured and estimated infant energy expenditure using standard equations.

Conclusions:

• Maternal resistance exercise during pregnancy is a viable lifestyle intervention to increase infant energy expenditure.
• This intervention may help mitigate excessive infant adiposity gain and improve metabolic outcomes.
• Maternal metabolic health plays a crucial role in determining infant metabolic rate.