The goal of this study is to explore whether a group exercise program called Strength After Breast Cancer can be delivered in an outpatient physical therapy clinic to improve physical function among women after treatment for breast cancer.

The main questions this study aims to answer are:

• Can the Strength After Breast Cancer program and the associated outcome battery be successfully delivered in an outpatient physical therapy clinic at Massachusetts General Hospital and do participants find the program practical?
• What are the barriers to and facilitators of delivering the group exercise program in a clinical setting and what changes need to be made to the program to improve sustainability and to facilitate implementation at other clinical sites?

Participants will complete study questionnaires before and after engaging in the group exercise program and they will participate in interviews following participation in the program.

The goal of this single arm feasibility study of the Strength After Breast Cancer (SABC) evidence-based group exercise intervention for women after treatment for breast cancer is to determine if investigators can feasibly deliver the program out of the outpatient physical therapy clinic at Massachusetts General Hospital Waltham.

- Following a one-on-one physical therapy evaluation, the four-session SABC program provides a group-based but individualized exercise plan and encourages engagement in independent home-based exercises to improve physical function. The SABC program has previously been found to be safe and led to improvements in physical function among women after treatment for breast cancer. Therefore, the focus of this study is to explore clinical implementation barriers, facilitators, and necessary program adaptations to enhance sustainability and facilitate implementation at other clinical sites.

Study procedures include screening for eligibility, in-clinic visits, questionnaires, and a semi-structured interview.

Participation in this research study is expected to last up to 5 months. It is expected that up to 40 people will take part in this research study.

This is an unfunded study.

Inclusion Criteria:

• ≥18 years of age
• Diagnosed with Stage I-III breast cancer, having completed primary cancer treatment (e.g., surgery, chemotherapy, radiation therapy); hormonal therapies and adjuvant targeted therapies will be permitted

Exclusion Criteria:

• Any injury or medical condition that would prohibit being able to safely perform exercise as indicated by the Physical Activity Readiness Questionnaire (i.e., atrial fibrillation, chest pain or angina, uncontrolled high blood pressure or hypertension, loss of balance due to dizziness in the past 12 months, or loss of consciousness in the past 12 months).
• Non-English speaking

These eligibility criteria are aligned with the criteria outlined by the developers of the Strength After Breast Cancer program. This program was developed for women after treatment for breast cancer.

The Dana-Farber / Harvard Cancer Center encourages and supports the responsible and ethical sharing of data from clinical trials. De-identified participant data from the final research dataset used in the published manuscript may only be shared under the terms of a Data Use Agreement. Requests may be directed to: the Partners Innovations team at http://www.partners.org/innovation. The protocol and statistical analysis plan will be made available on Clinicaltrials.gov only as required by federal regulation or as a condition of awards and agreements supporting the research.

Data can be shared no earlier than 1 year following the date of publication

Contact the Partners Innovations team at http://www.partners.org/innovation