Free time spent sitting linked to higher risk of some cancers in women

By David Sampson

For several years now, research, including groundbreaking work done at the American Cancer Society, has sounded the alarm about cancer risk associated with time spent sitting. Now a new study co-authored by Alpa Patel, PhD, who also led earlier work on the link, digs deeper to find spending more leisure time sitting is associated not only with a higher risk of total cancer risk in women, but also with several cancers in particular: multiple myeloma, breast, and ovarian cancer.

The study, appearing in Cancer Epidemiology, Biomarkers, and Prevention, is the first to take a comprehensive look at site-specific cancers associated with sitting time. The higher risk was present even after taking into account BMI, physical activity, and other factors.

And for reasons that are as yet unclear, the study found no such association for men.

The link between physical activity and cancer prevention is well-established. But emerging evidence has focused specifically on the link between time spent sitting and cancer. That includes time spent sitting at work, and also leisure time. In both cases, time spent sitting has increased due to several factors, including technological advancements, like computers and video games, and changes in transportation; we walk/bike less, and drive/ride more.

For the current study, investigators compared leisure time sitting to cancer risk among more than 146,000 men and women (69,260 men and 77,462 women) who were cancer-free and enrolled in the American Cancer Society Cancer Prevention Study II Nutrition Cohort. During the time of the study, (1992 a�� 2009), 18,555 men and 12,236 women were diagnosed with cancer.

The investigators found more leisure-time spent sitting was associated with a 10 percent higher risk of cancer overall in women after adjustment for physical activity, BMI and other factors..

In women, sitting time was associated with a 65 percent increased risk of multiple myeloma, a …read more

Source:: American Cancer Society