Qualitative variables: Non-parametric test Chi-square test or Fisher's exact test - Compare the distribution in the socioeconomic level and physical activity habits (baseline), of the intervention group vs the control group. -Compare the distribution in the nutritional status and the stage of change, in each evaluation, of the intervention group vs the control group. -Compare the distribution of each food habit classified as "adequate or inadequate", in each evaluation, of the intervention group vs the control group. -Compare the changes in the stage of change, in the short and medium term, of the intervention group vs the control group.