Prehabilitation Exercise Program in Breast Cancer: Effects on Quality of Life and Tumor Microenvironment (PEP_BC)

After the allocation, the intervention will consist of a prehabilitation program lasting 4 weeks. Each week, there will be three sessions, with one being face-to-face and the other two being unsupervised sessions but with online video-support. Face-to-face sessions will be organized in small groups, and each patient of the PEP group will have an individualized plan based on data obtained during the initial assessment. Each session will include a combination of strength training and moderate aerobic training in a circuit format with movements especially involving the upper body.