Inclusion criteria:  Woman aged between 18 - 65 years. Diagnosis of stage 0 - III breast cancer. Primary treatment (surgery, radiotherapy and chemotherapy) completed at least 3 months ago may still be receiving hormonal therapy. Pain related to primary treatment in the last 6 months. Access to Internet and an electronic device that allows the use of the applications used in this study and skills for their use or assistance from a close person who has them. Hability to communicate fluently verbally and in writing in the language of the research team (Spanish). Approval of participation in the study by the coordinator of the health team that assisted her during the course of cancer and its treatment.  Exclusion criteria:  Another previous type of cancer or breast cancer recurrence in a period of less than 1 year. Medical diagnosis of a neurological, autoimmune or cardiovascular disease. Some type of pathology that is associated with a contraindication to physical exercise. Diagnosis of serious psychiatric disorder. Diagnosis of mental disorder.