ObjectiveTo assess the effect of a motivated physical activity program on the lipid parameters most related to excess weight (triglycerides [TG], and high density lipoprotein cholesterol [HDL]) in a weight-loss intervention in obese and overweight patients. MethodsA randomised and controlled, 2-arm, clinical trial and a 12-months follow-up was conducted. The patients included in the study were randomised into 2 intervention groups: motivational intervention of obesity with a previously trained nurse (G1), motivational group, with digital platform support and motivated physical activity program (iwopi [G2]).The anthropometric variables measured were height, weight, body mass index (BMI), as well as the analytical variables, total cholesterol, TG and HDL-C. ResultsA total of 123 patients participated in the study, of which 61 were randomised to G1, and 62 to G2. Both groups significantly decreased weight at the end of the study, with the decrease in G1 being 4.898kg, and 6.292kg in G2. In both groups there was also a significantly decrease (p<0.05) in total cholesterol and TG, and increase in HDL cholesterol, with these changes being more intense in the G2 group, as well as being the group that lost more weight. ConclusionsWeight reduction is accompanied by favourable changes in lipid parameters related to overweight and obesity, being more intense the greater the weight loss.