Facility-Based Multi-Modal Rehab vs. Home-Based Resistance Exercise for Quality of Life in Breast Cancer Survivors

Inclusion Criteria: * Histologically confirmed primary breast cancer * Stage I-III non-metastatic breast cancer following lumpectomy or mastectomy * Completed adjuvant chemotherapy (with or without radiotherapy) * Age ≥ 18 years * Able to understand and follow the study protocol * Willingness to attend facility-based exercise training. Exclusion Criteria: * Metastatic (Stage IV) breast cancer * Morbid obesity (BMI \> 40 kg/m²) * Uncontrolled hypertension (systolic blood pressure \> 180 mmHg and/or diastolic blood pressure \> 99 mmHg) * Presence of implantable medical devices (e.g., pacemakers, nerve stimulators) * Presence of metallic surgical implants (e.g., total hip or knee replacements) that interfere with assessment devices * Contraindications for resistance training (e.g., acute infectious disease, severe cardiac disease, severe respiratory insufficiency) * Concurrent malignant diseases * Current participation in intense systematic exercise training (defined as at least 1 hour, twice per week) * Previous participation in an exercise intervention clinical trial.