With unchanged eating habits, taking up sport will help you build muscle mass and increase your energy expenditure. The body will be toned, and any imbalance between food intake and energy expenditure will be corrected. However, physical activity, whether on its own or as part of a diet, does not necessarily lead to weight loss: in fact, athletes who are all muscle are generally very heavy on the scales. When dieting, sport becomes essential to maintain muscle mass (which tends to melt away) or avoid the weight regain often observed after dieting.

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.