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Updated: Apr 11, 2026
Author Spotlight: Enhancing the Offspring Health in Rats with Maternal Exercise During Pregnancy
Published on: April 5, 2024
Regular parental pre-mating exercise reduces offspring white adiposity and is associated with hypothalamic
Celia Muñoz1, Carla Canal2, Joel Vizueta3
1Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
Insights
Parental pre-mating exercise, especially in young parents, significantly impacts offspring body weight and fat. This exercise influences offspring development and hypothalamic gene expression during lactation.
Area of Science:
- Reproductive Biology
- Developmental Biology
- Metabolic Health
Background:
- Physical inactivity is a global health concern affecting current and future generations.
- The specific effects of parental pre-mating physical activity on offspring development are not well understood.
Purpose of the Study:
- To investigate how parental pre-mating exercise and age influence offspring body weight and composition.
- To explore the underlying mechanisms, including gene expression and milk composition, linking parental exercise to offspring outcomes.
Main Methods:
- Utilized a mouse model with voluntary wheel running to assess the impact of pre-mating exercise.
- Analyzed offspring body weight, adiposity, tibial length, and hypothalamic transcriptomic profiles.
- Examined maternal gene expression, breast milk composition, and microRNA (miRNA) content.
Main Results:
- Pre-mating exercise in young parents reduced offspring visceral and subcutaneous fat and affected tibial length in females.
- Offspring hypothalamic transcriptomic profiles were altered by parental exercise.
- Maternal pre-mating exercise induced lasting changes in lactation-related gene expression, milk composition, and miRNA content.
Conclusions:
- Parental age and pre-mating exercise interact to shape offspring post-weaning body composition.
- Maternal pre-mating exercise may influence offspring hypothalamic development and neurodevelopmental adaptations via milk-derived miRNAs.
- Regular parental pre-mating exercise offers potential benefits for offspring physiology and development.
Abstract:
Physical inactivity is highly prevalent worldwide and affects not only individual health but also the health of future generations. However, the impact of physical activity limited to the pre-mating period on offspring body weight and composition remains poorly understood. Using a voluntary wheel running approach in mice, we uncovered that post-weaning offspring body weight and composition are modulated by the combined effects of parental pre-mating exercise and parental age. During the mid-stage of lactation, pre-mating exercise in young parents reduced offspring visceral and subcutaneous adiposity, shortened tibial length in female offspring, and influenced offspring transcriptomic profiles of the hypothalamus, the central regulator of energy balance. Pre-mating exercise also led to modest long-lasting changes in the expression of lactation-related genes in maternal subcutaneous fat, as well as breastmilk nutritional composition and miRNA content. Nevertheless, these subtle milk-derived miRNA changes may influence offspring hypothalamic regulatory networks, providing initial evidence of how pre-mating maternal exercise may affect offspring hypothalamic development during the mid-stage of lactation. Together, these data provide a comprehensive understanding of how parental age and pre-mating exercise interact to shape post-weaning offspring body weight and composition, and offer deeper insights into how regular parental pre-mating exercise may influence offspring physiology and neurodevelopmental adaptations during lactation.
