Methodology: Design: Clinical, multicentric and randomized trial. A simple random sampling to select 134 patients diagnosed with dementia will be carried out. After contacting their relatives, his/her participation in the trial will be requested. A basal assessment will be made and the participants will be assigned to control or intervention group (1:1). Variables: The main measure will be the assessment of PA (pedometer and 7-Day PAR) in patients and caregivers. In patients: ADAS-cog, functional degree and cardiovascular risk. In caregivers: cardiovascular risk, general health and quality of life.