TeleHealth Resistance Exercise Intervention to Preserve Dose Intensity and Vitality in Elder Breast Cancer Patients

This study is testing whether a telehealth-based resistance exercise program (strength training done at home via video) can help older women with breast cancer maintain their chemotherapy schedule and overall energy levels. Chemotherapy often causes fatigue and muscle loss that leads doctors to reduce doses, so researchers want to see if exercise can prevent this. **You may be eligible if:** - You are a woman aged 65 or older - You have been diagnosed with stage I–III invasive breast cancer - You are scheduled to receive at least 10 weeks of chemotherapy (before or after surgery) with the goal of cure - Your BMI is between 18 and 50 - You are able to walk for at least 6 minutes - You can read and speak English **You may NOT be eligible if:** - You are male - You are under 65 - Your chemotherapy regimen does not include an anthracycline or taxane drug - You cannot walk or use assistive devices - You cannot understand or speak English Talk to your doctor to see if this trial is right for you.