Does Exercise Reduce Your Cancer Risk?

The New York Times reports:

Finnish researchers recently concluded that, if you wish to ward off lung or gastrointestinal cancer, you might want to spend your leisure time jogging instead of picking berries, mushroom gathering or fishing. In the study, published in late July on the Web site of the British Journal of Sports Medicine, scientists studied the health of a group of 2,560 middle-aged Finns over the course of about 17 years. The subjects, all men living in eastern Finland, kept diaries of their daily activities for a year and then went about them.