Does Exercise Reduce the Risk of Breast Cancer?

Does Exercise Reduce the Risk of Breast Cancer?

Exercise Lowers Estrogen Levels, Reducing Breast Cancer Risk

Breast Cancer Risk and Physical Activity Breast cancer is prevalent among women, especially in advanced age. However, recent studies have shown that physical activity can reduce the risk of breast cancer. Exercise lowers estrogen levels, an essential factor in breast cancer risk.

Exercise and Hormone Levels in Older Women

Recent studies have also shown that physical activity can lower estrogen levels in older women. Postmenopausal women who exercise regularly have a lower risk of breast cancer due to this reduction in estrogen levels.

A New Study: The Effect of Exercise on Hormone Levels

To better understand how exercise affects hormone levels, the Polish Breast Cancer Research Association conducted a study with 540 Polish women aged 40 to 74 who had not received hormone therapy before and were physically active. The study measured their activity levels with speedometers worn on their waists and conducted urine tests.
The study showed that exercise reduces estrogen levels and increases some estrogen-blocking substances. This provides more precise information on how exercise can reduce the risk of breast cancer.

Additional Health Benefits of Exercise

Besides reducing breast cancer risk, exercise has other health benefits as well. For example, regular exercise helps maintain heart health, reduces the risk of diabetes, and aids in weight control. Weight control, in turn, lowers estrogen levels and reduces the risk of breast cancer.


Hormones play a significant role in breast cancer, and exercise is proven to lower hormone levels, thus reducing the risk of breast cancer. In addition, regular exercise protects against not only cancer but also other diseases such as heart and diabetes diseases.