Lauren McCullough, MSPH, of the University of North Carolina at Chapel Hill conducted a population-based study in pre- and post-menopausal women, investigating the impact of exercise on incidence of breast cancer. The study involved 1504 women with cancer and 1555 women without cancer.
Women who engaged in physical exercise 10 to 19 hours per week during their reproductive years showed a 1/3 reduction in breast cancer compared with women who got minimal exercise. Similarly, women after menopause who exercised 9 to 17 hours per week showed a 30% reduction in breast cancer.
Interestingly, exercising more than 19 or 17 hours in pre- and post-menopausal women, respectively, did not produce better results in reducing the incidence of breast cancer. The results were actually worse. In addition, significant weight gain seems to reduce the benefits of exercise in preventing cancer.
There is no consensus as to why exercise is beneficial in reducing cancer rates. However, the research group noted a number of possible explanations: it may reduce the level of insulin resistance which has been associated with cancer, or inflammation which is also related to cancer incidence. Alternatively, exercise may simply reduce the tendency toward obesity that is strongly associated with raised cancer rates.
The views, opinions and information expressed in articles and blog posts published on imperfectparent.com and all subdomains are those of the authors alone. They do not represent the views or opinions of The Imperfect Parent or its staff, nor do they represent the views or opinions of any entity of, or affiliated with, Imperfect Parent. The Imperfect Parent
is designed for entertainment
purposes only and is not meant to be a substitute for medical, health,
legal, or financial advice from a professional.
of material from any of Imperfect Parent's pages without written
permission is strictly prohibited.