Researchers conducted a meta-analysis to see the link between exercise and cancer deaths and found that patients who followed the government guidelines of performing a minimum of 2.5 hours of moderate exercise a week had a 27% lower chance of death by cancer then those who didn't.
They also studied the general population and found that performing the recommended exercise guidelines reduced the chances of dying from cancer by 13%.
The authors of the study concluded, "Our study supports that current physical activity recommendations reduce cancer death in both the general population and cancer survivors. We infer that physical activity after cancer diagnosis may result in significant protection among cancer survivors."