The Impact of a Physical Activity Program on Biomarkers of Aging During Chemotherapy for Breast Cancer

Our research team has determined that p16INK4a - a biomarker of aging -- increases dramatically during chemotherapy and that p16 levels among patients of similar age are lower among those who exercise. We hypothesize that engagement in physical activity during chemotherapy will have a moderating effect on increases in p16 levels during chemotherapy. To test this hypothesis, we propose to enroll 48 patients age 21-64 with a Stage I-III breast cancer diagnosis who are about to start adjuvant or neoadjuvant chemotherapy in a physical activity intervention program. Our primary objective is to compare the change in p16 from baseline to end of chemotherapy for participants in this study (who are engaged in a physical activity intervention) to the mean change in p16 seen in a previous study of similar patients who did not participate in a physical activity intervention. As secondary objectives, we propose to evaluate (1) changes in treatment-related toxicity, physical function, fatigue, and quality of life between baseline, end of chemotherapy and 6 months post-chemotherapy, (2) the association of changes in p16 levels with changes in measures of treatment-related toxicity, physical function, fatigue, and quality of life, and (3) the association of changes in physical activity levels with changes in measures of treatment-related toxicity, physical function, fatigue, and quality of life.