Maternal Exercise Does Not Significantly Alter Adult Rat Offspring Vascular Function.

Area of Science:

• Reproductive biology
• Developmental biology
• Cardiovascular physiology

Background:

• Adverse prenatal behaviors negatively affect offspring metabolic and cardiovascular health.
• Positive prenatal behaviors, like maternal exercise, are understudied regarding their effects on offspring health.

Purpose of the Study:

• To investigate the impact of voluntary maternal exercise during pregnancy on offspring endothelial function.
• To test if maternal exercise improves vascular function in offspring compared to sedentary controls.

Main Methods:

• Female Sprague Dawley rats were assigned to sedentary or voluntary exercise groups throughout gestation.
• Offspring were assessed for litter characteristics, food consumption, activity levels, and vascular function (vasorelaxation) at 4 and 8 months of age.
• Vascular function was measured using acetylcholine (endothelium-dependent) and sodium nitroprusside (endothelium-independent) vasodilators.

Main Results:

• No significant differences were observed in litter size or weight at weaning between groups.
• Offspring food consumption and activity levels were comparable between sedentary and exercise groups at multiple ages.
• Maternal exercise did not alter the vasorelaxation response to either endothelium-dependent or independent vasodilators in offspring.

Conclusions:

• Voluntary maternal wheel running during pregnancy does not significantly influence offspring behavior.
• Maternal exercise during gestation does not lead to significant alterations in adult offspring vascular function.