Lifestyle Intervention on Patients With Overweight or Obesity

This study aims to analyze the effects of a 3-month self-applied online program, focused on promoting healthy lifestyle habits (healthy eating and increased physical activity), on adults with obesity. Participants will be recruited by 8 doctors from 6 public Health Centers. These patients will be randomized allocated into two interventional groups: the experimental group will receive audiovisual instructions from their specialist doctor, and the control group from a doctor outside the patient. Assessment will include sociodemographic variables, body mass index, blood pressure, glycemic and lipid metabolism variables, physical activity level, adherence to the Mediterranean diet, therapeutic alliance, and health-related quality of life. The randomization process will be stratified according to BMI, therapeutic alliance, age, and sex.