Introduction: The study of social representations in patients with obesity allows us to understand and explain the behavior of each individual regarding their lifestyle decisions. Objective: To analyze the social representations that patients with obesity have around physical activity, sport and diet. Method: The present study is of qualitative type A semi-structured interview was created and applied to 28 patients with Body Mass Index (BMI) of 30.0 - 39.9 Kg / m2, considered as obesity grade I and II, according to the World Health Organization the speeches obtained with the help of the Iramuteq software were analyzed. Results: Physical activity, sport and diet in patients with obesity is associated with the generation and adaptability of new healthy lifestyles focused on the structures of education, ideology, health, society, behavior and psychology. Conclusion: The social representations of physical activity, sport and diet of patients with obesity are built based on their ideals, culture, customs, habits, so the constant practice of a food culture adapted to basic lifestyle needs, set up anti-obesogenic environments in social groups where the modification of their lifestyle will be based on a healthy paradigm.