Exercise Intervention in Women Diagnosed With Triple-negative Breast Cancer Receiving Oncologic Treatment

The experimental group starts with 5 minutes of unloaded cycling, followed by 3 × 3-minute HIIT training sequences alternating between: i) 30 seconds at 90% of maximal PO (70 rpm for 30 seconds) and ii) 30 seconds of light pedaling at 20% of PO). Recent work suggests that this high-intensity approach to aerobic exercise is feasible and safe, even during acute oncology treatment. The HIIT sequences are interspersed with two 3-minute cycling sessions at moderate intensity. The training session will be concluded with a 5-minute cool-down by cycling (light pedaling) and stretching. This protocol will be performed twice a week throughout the study, and all patients who reach an 80% adherence threshold for the exercise intervention will be included in the final analysis.