This fits well into my sense that the minutes you spend exercising tend to come back to you, and then some. From the study's release:
Boston, MA – A new study of men with prostate cancer finds that physical activity is associated with a lower risk of overall mortality and of death due to prostate cancer. The Harvard School of Public Health and University of California, San Francisco researchers also found that men who did more vigorous activity had the lowest risk of dying from the disease. It is the first study in men with prostate cancer to evaluate physical activity after diagnosis in relation to prostate cancer-specific mortality and overall mortality.
The study appears in an advance online edition of the Journal of Clinical Oncology.
“Our results suggest that men can reduce their risk of prostate cancer progression after a diagnosis of prostate cancer by adding physical activity to their daily routine,” said Stacey Kenfield, lead author of the study and a Harvard School of Public Health researcher. “This is good news for men living with prostate cancer who wonder what lifestyle practices to follow to improve cancer survival.”
The results showed that both non-vigorous and vigorous activity were beneficial for overall survival. Compared with men who walked less than 90 minutes per week at an easy pace, those who walked 90 or more minutes per week at a normal to very brisk pace had a 46% lower risk of dying from any cause.
Only vigorous activity—defined as more than three hours per week—was associated with reduced prostate cancer mortality. Men who did vigorous activity had a 61% lower risk of prostate cancer-specific death compared with men who did less than one hour per week of vigorous activity.
This program aired on January 5, 2011. The audio for this program is not available.