Health Economic Evaluation of an Adapted Physical Activity Program for Women With Breast Cancer

This study is evaluating the health-economic value of an adapted physical activity (exercise) program specifically designed for women undergoing treatment for breast cancer. Researchers want to understand whether this program is cost-effective and beneficial during active treatment. **You may be eligible if...** - You are a woman diagnosed with breast cancer (any type, any grade, any stage) - You are currently receiving treatment, which may include surgery, chemotherapy, radiation, or hormone therapy **You may NOT be eligible if...** - You have severely limited physical function or are in very poor health overall - You have unstable heart conditions (uncontrolled atrial fibrillation, recent heart attack, severe heart or breathing failure) - You have painful or unstable bone metastases or severe osteoporosis - You have had surgery within the last 3 weeks - You are pregnant or breastfeeding - You are currently enrolled in another interventional study or exercise program Talk to your doctor to see if this trial is right for you.