Metabolic trade‐offs in childhood: Exploring the relationship between language development and body growth

Author:

Bouton Sophie12ORCID,Chevallier Coralie3,Cissé Aminata Hallimat4,Heude Barbara4,Jacquet Pierre O.356ORCID

Affiliation:

1. Institut Pasteur Université Paris Cité, Inserm, Institut de l'Audition Paris France

2. Laboratoire de Sciences Cognitives et Psycholinguistique, Ecole Normale Supérieure Université PSL, INSERM Paris France

3. LNC2, Département d'études cognitives, Ecole Normale Supérieure Université PSL, INSERM Paris France

4. INSERM UMR 1153, Epidemiology and Biostatistics Sorbonne Paris Cité Center (CRESS) Developmental Origins of Health and Disease (ORCHAD) Team Paris Descartes University Villejuif France

5. Centre de recherche en épidémiologie et santé des populations Inserm U1018, université Paris‐Saclay université Versailles Saint‐Quentin Paris France

6. Institut du Psychotraumatisme de l'Enfant et de l'Adolescent Conseil Départemental Yvelines et Hauts‐de‐Seine et Centre Hospitalier des Versailles Versailles France

Abstract

AbstractDuring human childhood, brain development and body growth compete for limited metabolic resources, resulting in a trade‐off where energy allocated to brain development can decrease as body growth accelerates. This preregistered study explores the relationship between language skills, serving as a proxy for brain development, and body mass index at three distinct developmental stages, representing different phases of body growth. Longitudinal data from 2002 children in the EDEN mother‐child cohort were analyzed using structural equation modeling. Our findings reveal a compelling pattern of associations: girls with a delayed adiposity rebound, signaling slower growth rate, demonstrated better language proficiency at ages 5–6. Importantly, this correlation appears to be specific to language skills and does not extend to nonverbal cognitive abilities. Exploratory analyses show that early environmental factors contributing to enhanced cognitive development, such as higher parental socio‐economic status and increased cognitive stimulation, are positively associated with both language skills and the timing of adiposity rebound in girls. Overall, our findings lend support to the existence of an energy allocation trade‐off mechanism that appears to prioritize language function over body growth investment in girls.Research Highlights The high energy demand of neurocognitive development leads to a trade‐off in human children between brain growth and other biological functions, including body growth. Previous studies indicate that around age 5, when the brain energy consumption peaks, children typically experience a decrease in body mass known as ‘adiposity rebound’. A delayed adiposity rebound, indicating slower growth may be associated with enhanced language abilities in children. Our preregistered study confirms this correlation in girls and further associates early cognitive stimulation with improved language skills and delayed adiposity rebound time.

Funder

Fondation Fyssen

Agence Nationale de la Recherche

Publisher

Wiley

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