Approximately 300 breast cancer survivors living in Northern Alberta will be randomized to one of four groups: (1) an exercise recommendation only group (viewed as the current standard of care), (2) an exercise recommendation plus pedometer group, (3) an exercise recommendation plus printed materials group, and (4) an exercise recommendation plus pedometer and printed materials group. Our primary hypothesis is that participants in the three intervention groups will report a greater positive change in physical activity than participants in the exercise recommendation only group. Furthermore, we expect that participants receiving the combined pedometer and printed materials intervention will report the greatest change in physical activity. Our secondary hypotheses are that these interventions will also result in improved QoL and more positive social cognitive beliefs about exercise in breast cancer survivors. Our sample size was determined by a power calculation. Based on the literature, we believe that an increase of 2,000 steps per day is a meaningful change that will result in health benefits for breast cancer survivors. We estimate a standard deviation of about 4,000 steps per day. Therefore, to detect a medium standardized effect (d = .50) with a power of .80 and a two-tailed alpha <.05, we need 63 participants per group. To account for a possible 15% loss to follow up, we will randomize 75 participants to each group. Our printed materials will be developed based on the tenets of the theory of planned behavior and will include activities designed to enhance instrumental and affective attitudes, injunctive and descriptive norms, and self-efficacy and perceptions of control. These materials will be developed based on our previous research identifying the key beliefs that should be targeted in a theory of planned behavior-based intervention.