A new study suggests that getting just the recommended amount of physical activity is linked to a reduced risk of 7 types of cancer
Current recommendations call for 2.5 to 5 hours per week of moderate-intensity activity or 1.25 to 2.5 hours per week of vigorous activity; both amounts correspond to 7.5-15 metabolic equivalent task hours/week.
The team found that people who got in this range had a reduced risk for seven types of cancer: in men, but not women, a lower risk of colon cancer ; in women, lower risk of breast cancer , endometrial cancer , and non-Hodgkin lymphoma . Both sexes had reduced risk of kidney cancer , myeloma , and liver cancer .
People who got more exercise than the recommended levels had even lower risk of certain types of cancer , making the risk reduction dependent on exercise “dose.” Another interesting finding had to do with the fact that the risk reduction was quite varied—for instance, for breast cancer there was a 6%-10% lower risk, but with liver cancer, there was a 18%-27% reduced risk.
“These findings provide direct quantitative support for the levels of activity recommended for cancer prevention and provide actionable evidence for ongoing and future cancer prevention efforts,” the authors write. In other words, the current exercise guidelines are legit, and worth trying to incorporate those few hours of moderate or vigorous activity into the week.
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