Lead investigator Anne McTiernan, M.D., Ph.D., a member of Fred Hutchinson's Public Health Sciences Division, and colleagues report the results of the largest randomized clinical trial to assess the effect of exercise on overall and intra-abdominal obesity in postmenopausal women in the Jan. 15 issue of the Journal of the American Medical Association. Researchers from Fred Hutchinson, the University of Washington, Yale University and the University of Colorado collaborated on the study.
"Even if a woman who exercises regularly doesn't see the benefits of dramatic weight loss on her scale, our results indicate that she can feel confident that she is improving her health, because regardless of the amount of weight lost, we now know that exercise reduces hidden intra-abdominal fat, the most dangerous type of fat," said McTiernan, director of Fred Hutchinson's Prevention Center and an international expert on the impact of physical activity on cancer prevention. "This study gives us direct evidence that exercise can affect biology related to cancer and other chronic diseases in older women."
Reducing intra-abdominal, or visceral, fat is important because in addition to increasing the risk of cardiovascular disease and diabetes, among other conditions, such fat can raise insulin levels, which promotes the growth of cancer cells.
People with high levels of intra-abdominal fat may not even know it, McTiernan said, because it is hidden, deposited around the internal organs within the abdomen. "Most women don't know about intra-abdominal fat, but they should, since it is the m
Contact: Kristen Lidke Woodward
Fred Hutchinson Cancer Research Center