Weight gain at puberty is primarily physiological: it's linked to the adolescent growth spurt at this time. Around 50% of adult weight is gained during puberty, and annual weight gain reaches + 9 kg/year at its peak. However, certain factors can lead to excessive weight gain during puberty: physical activity decreases at this age, particularly in adolescent girls. Adolescence can also be a time of unstructured eating habits (snacking, preference for fatty and sugary foods, etc.).

For further information, we recommend that you consult :

- The MangerBouger.fr website
- The Santé Publique France website, and its nutrition and physical activity section
- The ANSES website (Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail), and its section on food and human nutrition.
- The French Nutrition Society website
- The report of the PNNS, Programme Nationale de Nutrition et Santé (2018-2023), which defines all nutritional recommendations.