Patients who receive chemotherapy for their cancer often report trouble thinking, remembering or concentrating known as brain-fog or chemo-brain. A Canadian study of women undergoing chemotherapy for breast cancer found patients who started an aerobic exercise program at the same time they began chemo self-reported better cognitive functioning and quality of life compared to patients receiving standard care without aerobic exercise. Even patients who waited to begin exercising until after they completed chemotherapy showed improved cognitive performance compared to those not exercising. The study, appearing in the American Cancer Society journal CANCER, strengthens the case for making an aerobic exercise program part of cancer care—that it may help empower patients to manage both physical and mental health.