National Cancer Institute: "Prescribing Exercise as Cancer Treatment: A Conversation with Dr. Kathryn Schmitz."<br>National Institutes of Health: "Effects of exercise on immune function in patients with cancer: a systematic review."<br>Penn State Health News: "Exercise can now be prescribed like medicine for people with and beyond cancer."<br>Mayo Clinic: "Exercise intensity: How to measure it."<br>Exerciseismedicine.org: "Sit Less. Move More."