Diligent relaxed exercise, such as walking, is beneficial in reducing the risk of breast cancer. Researchers from the Mayo Clinic College of Medicine in Rochester, Minnesota, United States, led by Dr. Aditya Bardia, MD, MPH, in a report in the Archive of Internal Medicine, even stated that exercise appears to be a powerful preventive way to tame even the most aggressive tumors.
In a study conducted by the research team, it was found that women who often have high recreational activities are very less likely to get breast cancer. Women who exercise are also less likely to develop breast tumors that carry estrogen receptors but do not have progesterone receptors. These tumors are usually more aggressive than tumor types with different receptor configurations.
Previous research on exercise and breast cancer has yielded mixed results, perhaps because exercise has a different effect on the risk of the different types of tumors that can arise. Researchers looked at 36,363 women who participated in the Iowa Women's Health Study to find out more.
During the 18-year follow-up period, 2,548 cases of breast cancer occurred. Tumors carrying estrogen and progesterone receptors are the most common, accounting for 71.1% of breast cancer cases. The next number, namely 13.5%, were tumors with estrogen receptors but no progesterone receptors, then tumors without both receptors (13.1%), and then tumors with only progesterone receptors (2.3%).
Overall the researchers found that the most active group of women had a 14% lower risk of developing breast cancer than other groups of women. The likelihood of this group of active women is also 33% lower to develop tumors that carry only estrogen receptors.
"In addition to the benefits to health in general, exercise will substantially prevent this disease," said the researchers.
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