Inclusion Criteria:  Patients aged 70 or over. Advanced stage solid cancer (stage-III [unresectable] or stage-IV [metastatic]) Candidates for first-line systemic treatment (chemotherapy, hormone therapy, biological therapies or immunotherapy) or in successive lines if the time that has elapsed since the last dose of treatment has been at least 6 months (washout period). Patients with breast, gynecological, lung, pleural, digestive, urological, ENT area, sarcomas, brain tumors, melanomas and patients with tumors of unknown origin will be included.  Exclusion Criteria:  ECOG ≥3 cases of advanced dementia serious psychiatric illnesses, Lack of basic fluency in the Basque or Spanish language those patients unable to get up from the chair and walk independently with or without auxiliary device. Neither will those patients who participate in other studies in which they are undertaking a physical exercise program be included. Absolute or relative contraindications in which the risk of adverse effects outweighs the possible benefits such as unstable angina, acute symptomatic heart failure ...