Stay on Track: A Study of Exercise Effects During Radiation

Inclusion Criteria:

> 18 years of age;
confirmed primary non-metastatic breast adenocarcinoma;
planned lumpectomy/segmentectomy/partial mastectomy surgery for primary breast cancer;
planning to undergo adjuvant whole breast radiation therapy following a lumpectomy;
Have a Karnovsky Performance Score of 70 or above (see Appendix)
Patient's Body Mass Index (BMI) is greater than determine by the treating physician, not currently meeting physical activity guidelines: moderate physical activity for at least 30 minutes at least five days a week AND 2 weekly sessions of resistance exercise;
have access to a mobile phone with capacity for text messaging (either unlimited or aware and accepting of text messaging charges);
understand and speak English;
physically able to engage in the intervention;
accepting of randomization (Note that anti-estrogen therapy is allowed.)

Exclusion Criteria:

Patients who have metastatic disease;
Patients with a history of prior malignancy within the past 3 years, other than non-melanoma skin cancer.
Patients with serious orthopedic, cardiovascular, or pulmonary conditions, have serious psychiatric or cognitive problems.
Patients who have received chemotherapy for their breast cancer.
Patients with prior radiotherapy to primary site or adjacent site that results in overlapping radiation fields.