Treatments for breast cancer can cause side effects, such as pain and fatigue, which can decrease a patient’s quality of life—especially in patients with metastatic breast cancer who undergo continuous treatment. A multi-nation study presented to the San Antonio Breast Cancer Symposium showed a structured exercise program improved quality of life among metastatic cancer patients, including less fatigue, compared to those who did not take part in the exercise program. Among the benefits—significantly less pain and better social functioning. Researchers say many of the patients in the study chose to continue exercising beyond the nine-month study, making it part of their cancer treatment program.