Muscle Oxygen Saturation and Functional Capacity in Breast Cancer Survivors

Participants will complete three physical performance tests: (1) the 6-Minute Walk Test (6MWT), (2) the 30-Second Sit-to-Stand Test, and (3) a submaximal treadmill test. Muscle oxygen saturation (SmO2) will be continuously monitored during the tests using near-infrared spectroscopy (NIRS) devices placed on the intercostal, quadriceps, and triceps surae muscles. Additional variables such as heart rate, perceived exertion, respiratory pressures, pulmonary function, and fatigue will be assessed during or after the tests.