A new study shows another potential benefit to exercise. In the study, published in the journal Prostate Cancer and Prostatic Diseases, researchers at Edith Cowan University in Australia determined that a single exercise session can suppress tumor growth in cancer patients and actively fight cancerous cells. They studied nine patients with late-stage prostate cancer and measured the levels of myokines, a protein released by skeletal muscles that appear to protect against chronic diseases. They found that patients had higher levels of myokines immediately following their workout. The researchers point out that exercise is not a cure for cancer, but it might prolong life expectancy of those with cancer.