The primary purpose of the present study is to pilot test the feasibility and acceptability of a 12 week mHealth intervention to increase PA in metastatic breast cancer (MBC) patients using a two-arm randomized control trial (RCT). We will also examine the effects of the intervention on symptom burden, quality of life, and functional performance. Inactive MBC patients will be assigned to Fit2ThriveMB or education control. Participants assigned to the Fit2ThriveMB will receive the Fit2ThriveMB smartphone app, Fitbit, and coaching calls. Participants in the education control will be asked to download the app cancer.net from the American Society of Clinical Oncology, will receive educational materials and calls during the intervention period and the Fitbit following completion of 12 week assessments.
