Personalized Exercise Program for Survivors of Breast Cancer, STEPS-BC Trial

PRIMARY OBJECTIVES: I. To determine if a \> 10% difference exists in change (i.e., 2.06 ml/kg/min difference) in peak oxygen consumption (VO2) from baseline to 24 weeks after initiating cancer treatment between participants receiving the PAI+HLI versus HLI alone. II. To determine if a \> 10% difference in change in left ventricular ejection fraction (LVEF) from baseline (up to ≤ 4 weeks of chemotherapy initiation) to 24 weeks after initiating cancer treatment exists between participants receiving the PAI+HLI versus HLI alone. SECONDARY OBJECTIVES: I. To determine if a \> 10% difference in change in LVEF from baseline to 12 weeks after initiating cancer treatment exists between participants receiving the PAI+HLI versus HLI alone. II. To assess changes in 6-minute walk, health-related quality of life (HRQOL), fatigue, strength, physical activity, sedentary and sitting behaviors and physical function between PAI+HLI and HLI alone groups at baseline to 12 \& 24 weeks after initiating cancer treatment. EXPLORATORY OBJECTIVES: I. We will examine time-dependent changes in traditional and emerging cardiovascular (CV) disease risk factors, including HRQOL, fatigue, chronic psychosocial stress, objectively-assessed physical activity levels, sedentary and sitting behaviors, 6-minute walk distance, self-efficacy for exercise, plasma lipidomics, pro-inflammatory cytokine and fibrosis biomarkers, left ventricular (LV) injury, heart failure (HF), and social determinants of health on exercise capacity and LVEF. II. In a subset (n=50), we will use innovative measures of magnetic resonance imaging (MRI) exercise-associated cardiac output (ExCO) and LV myocardial fibrosis with and without gadolinium contrast to examine mechanisms underlying exercise intolerance and LV dysfunction. OUTLINE: Patients are randomized to 1 of 2 arms. ARM 1: Within three weeks or less of chemotherapy start date, patients access the Trainerize application (app) and attend two virtual pre-chemotherapy exercise sessions over 10-20 minutes each promoting the importance of staying active across the day and throughout treatment and the identification of limitations and familiarization with different types of exercise. Following chemotherapy initiation, patients attend virtual personalized exercise sessions over 20-60 minutes each and organized health workshops over 40 minutes each once a week (QW) during weeks 1-4, once every 2 weeks (Q2W) during weeks 5-16, and once every 4 weeks (Q4W) during weeks 17-24 in the absence of unacceptable toxicity. Patients also receive a Fitbit device, resistance bands, and a loaner tablet, if applicable, on study. Additionally, patients undergo blood sample collection, cardiovascular magnetic resonance imaging (CMR), and cardiopulmonary exercise testing (CPET) on study. Patients may also optionally undergo exercise cardiovascular magnetic resonance imaging (ExeCMR) on study. ARM 2: Within three weeks or less of chemotherapy start date, patients attend a virtual pre-chemotherapy organized health workshop over 60 minutes. Following chemotherapy initiation, patients attend virtual organized health workshops over 60 minutes each QW during weeks 1-4, Q2W during weeks 5-16, and Q4W during weeks 17-24. Patients also receive a loaner tablet, if applicable, on study. Additionally, patients undergo blood sample collection, CMR, and CPET on study. Patients may also optionally undergo ExeCMR on study.