Breast cancer survivors, from diagnosis until the end of life, go through many transitions. One major transition is the significant decrease of physical activity immediately after diagnosis. Despite the known benefits of physical activity—speeding recovery time and reduced cancer recurrence risk—only 1 in 3 survivors met physical activity recommendations of 150 minutes of moderate-intensity activity per week. Physical activity interventions have shown effectiveness in helping breast cancer survivors increase physical activity during treatment, but limited evidence-based physical activity interventions have been incorporated into the clinic and community. To address this limitation, the investigators are partnering with the UTMB breast cancer support group to conduct a 12-week physical activity intervention, Pink Warrior.