This cross-sectional observational study aims to assess muscle oxygen saturation (SmO2) in the intercostal, quadriceps, and triceps surae muscles using near-infrared spectroscopy (NIRS) during functional exercise tests in breast cancer survivors. Participants will be grouped based on their previous cancer treatment: hormonal therapy only or hormonal therapy combined with chemotherapy. Functional performance will be evaluated through the 6-Minute Walk Test, 30-Second Sit-to-Stand Test, and a submaximal treadmill test. The study will analyze differences in muscle oxygenation and performance between groups and explore associations with other functional and clinical parameters.
Women aged 30 to 70 years
Clinical history of breast cancer treatment (at least 6 months prior)
Completed primary cancer treatment
Ability to perform physical tests
Recurrence or metastasis
Severe cardiopulmonary or musculoskeletal disease
Neurological or cognitive limitations
Ongoing oncological treatment