Dietary and Exercise Interventions in Reducing Side Effects in Patients With Stage I-IIIa Breast Cancer Receiving Aromatase Inhibitors

Inclusion Criteria:

* At least 6 months since breast cancer diagnosis up to 2 years since diagnosis.
* Diagnosed with localized breast cancer, up to stage IIIa.
* Has been taking aromatase inhibitor (AIs) for at least six months.
* Has been experiencing mild to moderate arthralgia (joint pain) for at least 2 months determined by the Brief Pain Inventory (BPI).
* At least 6 months post chemotherapy or radiation treatment.
* Subjects must be in good health as determined by medical history, physical examination, iDXA scan and clinical laboratory measurements.
* Postmenopausal either natural or surgical or postmenopausal caused by ovarian suppression treatments administered to premenopausal women.
* Currently taking aromatase inhibitor medication.

Exclusion Criteria:

* Diagnosed with metastatic breast cancer.
* Currently undergoing chemotherapy or radiation treatment.
* Food allergies of any kind, or any medical condition requiring mandatory dietary restrictions.
* A bone mineral density (BMD) T score less than -1, or fracture since taking AIs, or current use of glucocorticoids.
* Taking bisphosphonates or any other medication for bone loss.
* Significant cardiac, pulmonary, renal, liver or psychiatric disease.
* Currently undergoing or engaging in a regular exercise program.
* Muscular, orthopedic, or cardiovascular limitations that would prevent full participation in exercise.
* Body mass index (BMI) greater than 40 kg/m\^2.