Women can reduce their risk of breast cancer through physical exercise as long as they maintain their weight.
A new analysis, published in the journal Cancer, has found that physical activity, both light and vigorous, and before or after menopause, can reduce the risk of breast cancer.
Physical activity and risk of breast cancer.
Data from 1504 women with breast cancer (233 invasive and 1271 non-invasive) and 1555 women without breast cancer, aged 20 to 98 years, were included for this study.
They verified that women who did exerciseBoth during their reproductive years and after menopause, they had a lower risk of developing breast cancer.
Specifically, the women who did between 10 to 19 hours per week of physical exercise experienced the greatest benefit, with a risk of about a 30% lower, than women who did not do any type of physical exercise.
The risk reduction was observed in exercise of any intensity.
If it was found that even women who were more active did gain a lot, especially after menopause, the risk of developing breast cancer was higher. Which indicates that the weight gain may eliminate the beneficial effects of exercise about the rrisk of breast cancer.
Kantarjian H, Giles F, List A, Lyons R, Sekeres MA, Pierce S, et al. Cancer (2012). More information.