Dose-Response of Aerobic Training in Women at High-Risk for Development of Breast Cancer

The ultimate goal is for participants to complete 300 minutes/week of aerobic training per week at 55% to 100% of the individually determined exercise capacity (VO2peak) determined from CPETs performed at baseline, midpoint, and Study Follow-Up. The 300 minutes/week will be achieved by completing 5 aerobic training sessions/week for approximately 60 minutes/session. A minimum of 3 sessions/week are required to be supervised while the remaining 2 sessions can be supervised or unsupervised home-based. Participants on all Arms will receive a heart rate monitor prior to beginning unsupervised home-based aerobic training sessions. Vital sign monitoring guidelines for unsupervised sessions, prescribed at lower intensities, will be advised by the exercise physiologist at the time the session plan is provided to the patient. Patients will be instructed to not begin an unsupervised session if their resting heart rate or blood pressure is outside the recommended guidelines.

Usual care patients will receive a home-based, general physical activity program. Specifically, all patients assigned to general physical activity will receive an initial, in-person consultation with staff exercise physiologist outlining a structured home-based aerobic walking program with a goal up to 150 minutes per week outside of their normal daily activity. Patients can be provided with a fitness tracker (e.g. FitBit) to evaluate exercise duration and intensity. Patients may also be provided with an exercise log to records type, duration, and average heart rate during sessions. The exercise log is provided as a guidance tool and may be, although is not required to be, returned to study staff. Staff exercise physiologists will contact patients to check progress and answer questions.