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

Recent clinical trials showed promising results in patients with triple negative breast cancer (TNBC) who received four cycles of pembrolizumab (at a dose of 200 mg) every three weeks + standard chemotherapy, compared to patients who received placebo + chemotherapy alone. Importantly, the overall risk of disease progression that precluded surgery, local or distant recurrence, occurrence of a second primary cancer, or death from any cause was 37% lower with pembrolizumab chemotherapy compared to placebo chemotherapy. Exercise training is a supportive multi-effect strategy with the ability to influence multiple organ systems. There is growing epidemiologic evidence that a physically active lifestyle is associated with a lower risk of developing cancer, particularly colon and breast cancer. Recent preclinical studies suggest that exercise can control and attenuate the growth of tumor cells. Therefore, exercise could be a potential means to increase the rate of pCR in cancer patients in general. High-intensity interval training resulted in higher cardiorespiratory fitness levels, particularly in breast cancer and lung patients who exercised for at least 8 weeks, with a significant improvement (from 2.40 to 4.19 mL-min-1-kg-1) observed compared to control groups. The aim of this study is to investigate the effects of HIIT training on immune system response and pCR rates (most commonly defined as complete eradication of the tumor as a surrogate parameter for good prognosis) during neoadjuvant immunochemotherapy in women with TNBC. The working hypothesis is that HIIT training would activate the immune system and enhance the combination of neoadjuvant treatment, leading to higher rates of pCR in the aerobic group compared to the usual treatment group. Thus, this exercise model may also promote microvascular perfusion, improve tumor perfusion, and potentially lead to more favorable outcomes in neoadjuvant therapy, increasing the efficacy of systemic treatments and allowing for better therapeutic outcomes. The researchers support the idea that high-intensity aerobic exercise may at least partially challenge the large heterogeneity in response to medical treatment in women with a first diagnosis of TNBC and lead to higher response rates in the experimental group.