RecruitingNear Infrared Spectroscopy (NIRS) as a Method for Measuring Oxidative Capacity of Skeletal Muscle Mitochondria in Breast Cancer and All Gynecological Cancer PatientsParticipants recruited for this study will be breast cancer or gynecological cancer patients who agree to participate in an exercise study examining the effects of chemotherapy on muscle mitochondrial oxidative capacity, a measure of skeletal muscle health. Participants will ride a stationary bicycle and the quadriceps muscle will be non-invasively evaluated.