The purpose of this study is to determine whether a supervised exercise-training program, initiated prior to chemotherapy induction (pre-conditioning) and continued throughout chemotherapy treatment, can preserve short- and long-term cardiovascular performance, skeletal muscle function, cognitive ability and quality of life better than current standard or care recommendations for exercise during chemotherapy.
The primary aim of this study is to determine the efficacy of a novel, high-intensity aerobic interval exercise preconditioning protocol to ameliorate anthracycline-mediated cardiac and skeletal muscle toxicity in women with breast cancer undergoing de novo chemotherapy. Research Design: Women with breast cancer scheduled to undergo de novo chemotherapy with anthracyclines will be enrolled. Qualified patients will be randomized to either 1) a high-intensity interval exercise group, or 2) an attention-control group. Supervised exercise training will be carried out at the Mayo Clinic Cardiac rehabilitation center in Arizona on cycle ergometers using Electrocardiogram (EKG) telemetry. Patients in the high-intensity interval exercise group will perform four, 4-min intervals at 85-90% peak heart rate (PHR), separated by 3 min at 50% PHR. Each training session will begin with a 10-minute warm-up at 50% of PHR and end with a 5-min cool down at 50% PHR. The attention-controls will receive counseling consistent with standard of care regarding physical activity during chemotherapy. Attention-control group will receive a weekly phone call to maintain physical activity during chemotherapy and compliance will be verified using physical activity diaries and pedometers. Treatment for each group will commence 1-week prior to chemotherapy induction. The first dose of chemotherapy will be given within 16-18 hours of the last bout of exercise. High-intensity intermittent exercise (HIIE) training will be continued throughout four, 2-week cycles of chemotherapy (total training time = 9 weeks, 3 days/week).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
SINGLE
Enrollment
1
To avoid or reduce muscle soreness or cramps, adequate warm-up is suggested
Patients will be contacted weekly to access physical activity. To avoid or reduce muscle soreness or cramps, adequate warm-up is suggested
Mayo Clinic in Arizona
Scottsdale, Arizona, United States
Change in left ventricular ejection fraction
Echocardiography will be used to assess biventricular systolic function.
Time frame: baseline, approximately 2 months
Change in diastolic function
Echocardiography will be used to assess biventricular diastolic function.
Time frame: baseline, approximately 2 months
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