Yes - more and more evidence that it can substantially lower the risk of cancer.
Phys Ed: Does Exercise Reduce Your Cancer Risk? - Well Blog - NYTimes.com
What these recent studies, including the one from Finland, share is the suggestion that, in order to use exercise to reduce the risk of cancer, you must make yourself sweat. In the Finnish study, the most beneficial exercise was both frequent and demanding. The researchers used METs (an acronym for metabolic equivalent of task, a numerical comparison of the oxygen or energy used during an activity versus the amount used at rest) to characterize their subjects’ exercise habits. A MET of 1 is the equivalent of lolling inertly on the couch. In his study, jogging steadily for 30 minutes or so represented a MET of about 10. The men whose METs reached at least 5 almost every day were the least likely to die of cancer, especially of the lung or the gastrointestinal tract. Similarly, in one of the studies included in the colon cancer review, women who walked briskly for five to six hours a week were much less likely to develop colon cancer than those who strolled for 30 minutes per week.
>>>>>>
But it remains difficult to tease out the specific molecular effects of regular, brisk exercise from the generally healthy habits of exercisers. Although the Finnish study controlled for diet, the scientists write that other, unspecified “lifestyle factors” and the luck (good and bad) of genetics may well have affected their results. Still, their findings offer a prescription for potentially reducing your risk of certain cancers that has few obvious, undesirable side effects, except among the intractably lazy. “At least moderately intense physical activity is more beneficial than low intensity physical activity in the prevention of cancer,” the authors conclude. The takeaway, in other words, is that jogging trumps berry picking.
Comments