Once again exercise has been scientifically proven as a powerful tool for ensuring a long life. We all know working out is a key preventative measure for disease and illness, but a new study shows that even when we are sick—very sick in fact—exercise can even help save our lives. A new study reveals that chemotherapy works more effectively in conjunction with oxygen blood flow. Scientists tested two groups of mice, one sedentary and the other running on wheels, with cancerous tumors. The group of mice who had exercised had a significant reduction in tumor size after being treated with chemotherapy. The study’s co-author suggests that for humans undergoing cancer treatment exercise is advisable, and even more encouraged among cancer survivors. If you or a friend is going through chemotherapy, share this story with them, but of course consult your physician before you get going.