When people exercise regularly, their risk of cancer goes down.
If we needed more reason to go on a jog, or at least a brisk walk, a new study published in JAMA Internal Medicine offers some pretty strong incentive. It finds that people who get more activity in their leisure time have reduced risk of 13 types of the 26 types of cancer that were analyzed. The connections have largely been seen before, but this new analysis, in well over a million people, is a convincing once, since not only are the numbers are huge, but because the team breaks down the connection by type of cancer. And the size of some of the connections is striking.
Of the participants in the current study, gathered through the National Cancer Institute Cohort Consortium, 1.44 million provided information about the physical activity they did in their leisure time–walking, running, swimming and so on. Their average age was 59, and their average body mass index (BMI) was 26, meaning that many of the participants were overweight. No one had cancer at the time the study began. Over the next 11 years, give or take, about 187,000 incidents of cancer were logged.
Of the 26 types of cancer taken into account, there were links between getting more leisure time exercise and reduced risk of 13 varieties. People who were the most active (in the 90th percentile of activity level), as opposed to the least active (in the 10thpercentile), had reduced risk of the following 13 types of cancer:
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