RecruitingBehavioural interventionActivity Coaching During Pelvic Radiation TherapyResearch has shown that for women who are undergoing pelvic radiation therapy, fatigue is a common side effect. Fatigue that occurs during radiation therapy can make it harder to perform daily living activities. While there are studies that recommend exercise as a treatment for fatigue in cancer patients and survivors, there are currently no studies that focus on the role of exercise for women undergoing pelvic radiation therapy. The purpose of this study is to see if incorporating an activity coaching program is helpful in improving treatment-related fatigue for women undergoing pelvic radiation therapy for endometrial cancer.