For Colleen Johnson, running is more than just exercise. In fact, the 63-year-old endometrial cancer survivor recently completed a 100-mile ultramarathon to raise awareness for the disease.

“I’m just a single person. I don’t have money. I don’t have political influence. What I do have is my running shoes,” she said during the interview.

Johnson also advocated for the establishment of National Comprehensive Cancer Network (NCCN) guidelines for the treatment of the disease. In this week’s episode, we talk with her about her experiences with cancer, what drove her to become a distance runner and why she is passionate about spreading the word about endometrial cancer.