One simple lifestyle change lowers risk of breast cancer

2012-05-23 09:39

Losing just a little bit of weight can reduce levels of circulating estrogen that lead to breast cancer. Researchers from Fred Hutchinson Cancer Research Center, in a first study, showed high risk post-menopausal women who lost just a little weight also lowered their levels of sex hormones that increase breast cancer risk.

Weight loss and diet combo best for thwarting breast cancer

The intervention is a drug-free; simple approach that any woman can accomplish. Medications taken to thwart breast cancer block estrogen receptors but have side effects that are intolerable for some. The study showed diet and exercise to reduce body fat and weight can have a positive effect for lowering a woman's risk for the disease.

The researchers explored data from four groups of women from the Seattle area who were sedentary, overweight or obese; age 50 to 75. At the end of the study sex hormones were measured, including estrone, (estradiol and free estradiol); two types of testosterone (total testosterone and free testosterone.)

The women were assigned exercise – primarily brisk walking - diet, exercise plus dieting or no intervention.

Women who exercised and who exercised and dieted both met the goal of 10 percent weight-loss.

After weight loss all of the women had lower hormone levels, but the results were greater for women who dieted and exercised.

Anne McTiernan, M.D., Ph.D said in a press release, “The amount of weight lost was key to changes in hormone levels. The biggest effect was through diet plus exercise; exercise by itself didn’t produce much of a change in weight or estrogen.” For the long-term she recommends women do both to keep weight off and keep estrogen levels down.


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