ENERGIA: Personalized Exercise Program for Fatigue in Patients With Myeloproliferative Neoplasms and Chronic Myeloid Leukemia

Inclusion Criteria: Age ≥18 years Confirmed diagnosis of myeloproliferative neoplasm (polycythemia vera, essential thrombocythemia, low-risk primary myelofibrosis) or chronic myeloid leukemia according to WHO criteria Clinical and therapeutic stability for at least 8 weeks prior to enrollment Presence of clinically relevant fatigue as assessed by validated disease-specific questionnaires General clinical condition compatible with participation in a supervised exercise program of at least moderate intensity Absence of contraindications to cardiopulmonary exercise testing No participation in structured exercise or rehabilitation programs within the previous 3 months Minimum hematological safety parameters (hemoglobin \>10 g/dL; platelets \>100,000 × 10⁹/L) Ability to understand and comply with study procedures Provision of written informed consent Exclusion Criteria: Unstable cardiovascular conditions (including uncontrolled heart failure, recent myocardial ischemia, symptomatic ventricular arrhythmias, or unexplained syncope) Thrombotic or hemorrhagic events within the previous 3 months Active acute or chronic infections Severe orthopedic or neurological conditions limiting the ability to perform exercise or functional testing Severe systemic diseases (e.g., advanced renal or hepatic failure, active secondary malignancy, uncontrolled psychiatric disorders) Any clinical condition that, in the investigator's judgment, may compromise safety or adherence to the protocol Indicat…