Adults who stay active seem to have a powerful weapon against colorectal cancer. In one study, the most active people were 24% less likely to have the disease than the least active. It didn't matter whether what they did was work or play.
The American Cancer Society recommends getting 150 minutes per week of moderate exercise, like brisk walking, or 75 minutes per week of vigorous exercise, like jogging. Try to spread your activity throughout the week.