iMETX (Individualized Metabolic RX): a Pilot Study of an Environmental Intervention to Increase Energy Expenditure Among Breast Cancer Survivors

Objectives The investigators hypothesize that developing an individualized and dynamic exercise intervention (iMETX) that accounts for factors of the built environment will be feasible for breast cancer patients following primary treatment. This pilot study will assess the feasibility and provide preliminary estimates of effectiveness of the environmental intervention for increasing the energy expenditure and energetic capacity of breast cancer patients. The investigators will also explore patient feedback with this intervention and changes in levels of fatigue and quality of life. Experience and data from this initial pilot study will be used to refine the intervention and design subsequent studies to test its effectiveness.

Primary objective Evaluate the feasibility of an individualized, dynamic, environmental physical activity intervention for early stage breast cancer patients following primary treatment.

Secondary objectives

1. Determine a preliminary estimate of effect size of the environmental intervention on energetic capacity (power envelope) as measured by Power Protocol-B
2. Determine a preliminary estimate of effect size of the environmental intervention on average daily EE as measured by a wearable hybrid GPS/accelerometer physical activity monitor
3. Determine the effect of the environment intervention on the physical parameters of BMI and lean body mass
4. Determine the effect of the environmental intervention on patient reported fatigue and quality of life
5. Determine the persistence of changes in average daily EE after the intervention is complete (i.e., when individual movement tasks are no longer suggested).
6. Obtain formal and informal patient feedback throughout and after the intervention to assess satisfaction and perceptions of feasibility
7. Assess safety

Exploratory objectives Blood samples will be collected prior to and following the intervention and banked for future correlative studies, including the following: inflammatory cytokines (high sensitivity C reactive protein and interleukin 6), adipokines (adiponectin and leptin), sex hormones (estradiol, estrone, testosterone, and sex hormone binding globulin), and telomere length. In addition the invstigators will explore correlations of built and social environment characteristics and psychosocial characteristics with pre-intervention and changes in energy expenditure.