Exercise may reduce risk for cancer by as much as 25 percent | Arena District Athletic Club

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Bill Brown
Jan 02, 2020

Exercise may reduce risk for cancer by as much as 25 percent

Increasing physical activity to NIH-recommended levels can lower likelihood of colon, breast, kidney, liver and other types of cancer.

Engaging in recommended levels of physical activity can reduce a person's risk for certain types of cancer, new research shows. File photo by stevepb/Pixabay

Dec. 26 (UPI) — Resolving to exercise in the new year — and sticking to it — may help reduce a person’s risk for cancer, a new study suggests.

In findings published Thursday in the Journal of Clinical Oncology, researchers at the National Cancer Institute, the American Cancer Society, and the Harvard T.H. Chan School of Public Health report that people who engaged in physical activity as recommended by the National Institutes of Health were able to reduce their risk for seven different types of cancer by as much as 25 percent.

This included common — and deadly — forms of the disease like colon and breast cancers, as well as endometrial cancer, kidney cancer, myeloma, liver cancer, and non-Hodgkin lymphoma.

“Physical activity guidelines have largely been based on their impact on chronic diseases like cardiovascular disease and diabetes,” co-author Alpa Patel, senior scientific director of epidemiology research at the American Cancer Society, said in a press release. “These data provide strong support that these recommended levels are important to cancer prevention, as well.”

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Updated federal guidelines for physical activity recommend that people should aim for two and a half to five hours per week of moderate-intensity activity or 75 to 150 minutes per week of “vigorous activity.”

Moderate-intensity activities are those that get you moving fast enough or strenuously enough to burn off three to six times as much energy per minute as sitting quietly — as defined by a measurement called metabolic equivalency of task, or MET. Moderate-intensity exercise should burn off 3 to 6 METs, while vigorous-intensity activities burn more than 6 METs.

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Although numerous studies have demonstrated that physical activity is associated with a lower risk for several cancers, the exact relationship between exercise and the disease remains less understood. To learn more, Patel and colleagues analyzed nine studies involving more than 750,000 adult participants.

The pooled data included participants’ self-reported leisure-time physical activity and follow-up for cancer incidence, looking at the relationship between physical activity with incidence of 15 types of cancer.

The authors found that engaging in NIH-recommended amounts of physical activity — 7.5 to 15 MET hours per week — was associated with a significantly lower risk of seven of the 15 cancer types studied, with the reduction increasing with more MET hours.

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For example, physical activity was associated with a lower risk of colon cancer in men — 8 percent for 7.5 MET hours/week and 14 percent for 15 MET hours/week– and breast cancer in women — 6 percent for 7.5 MET hours/week and 10 percent for 15 MET hours/week. In addition, individual risk for endometrial cancer was reduced by 10 to 18 percent, while risk for kidney cancer was reduced by 11 to 17 percent.

Meanwhile, myeloma risk was reduced by 14 to 19 percent, while risk for non-Hodgkin lymphoma among women was reduced by 11 to 18 percent. Exercise had the most profound impact on liver cancer risk, reducing it by 18 to 27 percent.

The authors noted that, even with 750,000 total participants, the number with certain cancers was limited, suggesting that these trends may not be the same for the population at large. In addition, the majority of study participants were white, and the reliance on self-reported physical activity may mean that actual exercise levels were different.

Still, the authors concluded, “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.”

By Brian P. Dunleavy

The Arena District Athletic Club is more than just a gym, it’s a premier fitness facility located in the heart of the Arena District in downtown Columbus. We provide convenience and quality, featuring top-of-the-line equipment, top-notch personal trainers, spa-like locker rooms and a wide variety of free group fitness classes daily including Cardio, Spinning, Barre Fusion, Yoga, Boot Camp and more. We offer free 2-hour parking and convenient contract-free memberships, to fit your healthy lifestyle needs. Don’t just join, belong.

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