Changes in Cancer-related Cytokines After Participation in a Physical Activity Behavior Change Intervention (CICK Study)

It is important to confirm health benefits experienced by breast cancer survivors after participation in a physical activity behavior change intervention. One such potential benefit is a reduction in harmful inflammation that might lead to increased symptoms or cancer risk. Because little is known about how physical activity behavior change interventions influence inflammation in breast cancer survivors, the investigators study will measure inflammation with blood markers known as cytokines among breast cancer survivors before and after a physical activity intervention. Such information has the potential to lead to improved physical functioning, reduction in bothersome symptoms (e.g., fatigue), and reduced cancer risk in breast cancer survivors.