Inclusion Criteria:  Patients diagnosed with hemophilia A and B Patients with a medical diagnosis of hemophilic ankle and knee arthropathy People over 18 years of age Patients on prophylactic or on-demand treatment regimen with FVIII / FIX concentrates  Exclusion Criteria:  Patients with neurological or cognitive disorders that impede understanding of the test. Pain free patients Amputees, epileptics or patients with severe vision problems Patients who are receiving Physiotherapy treatment at the time of the study Patients who have not signed the informed consent document