Featured Research

from universities, journals, and other organizations

Exercise, even mild physical activity, may reduce breast cancer risk

Date:
June 25, 2012
Source:
Wiley-Blackwell
Summary:
A new analysis has found that physical activity – either mild or intense and before or after menopause – may reduce breast cancer risk, but substantial weight gain may negate these benefits. The findings indicate that women can reduce their breast cancer risk by exercising and maintaining their weight.

A new analysis has found that physical activity -- either mild or intense and before or after menopause -- may reduce breast cancer risk, but substantial weight gain may negate these benefits. Published early online in CANCER, a peer-reviewed journal of the American Cancer Society, the findings indicate that women can reduce their breast cancer risk by exercising and maintaining their weight.

While studies have shown that physical activity reduces breast cancer risk, many questions remain. For example, how often, how long, and how intense does physical activity have to be to provide benefits? Also, do women with all body types experience a reduced risk when they exercise, and does exercise reduce the risk of all types of breast cancer?

To investigate, Lauren McCullough, of the University of North Carolina Gillings School of Global Public Health in Chapel Hill, and her colleagues looked for a link between recreational physical activity, done at different time points in life, and the risk of developing breast cancer.

The study included 1,504 women with breast cancer (233 noninvasive and 1,271 invasive) and 1,555 women without breast cancer who were 20 to 98 years old and were part of the Long Island Breast Cancer Study Project, an investigation of possible environmental causes of breast cancer.

Women who exercised either during their reproductive or postmenopausal years had a reduced risk of developing breast cancer. Women who exercised 10 to 19 hours per week experienced the greatest benefit with an approximate 30% reduced risk. Risk reductions were observed at all levels of intensity, and exercise seemed to preferentially reduce the risk of hormone receptor positive breast cancer (ER or PR positive), which is the most commonly diagnosed tumor type among American women.

"The observation of a reduced risk of breast cancer for women who engaged in exercise after menopause is particularly encouraging given the late age of onset for breast cancer," said McCullough.

When the researchers looked at the joint effects of physical activity, weight gain, and body size, they found that even active women who gained a significant amount of weight -- particularly after menopause -- had an increased risk of developing breast cancer, indicating that weight gain can eliminate the beneficial effects of exercise on breast cancer risk.


Story Source:

The above story is based on materials provided by Wiley-Blackwell. Note: Materials may be edited for content and length.


Journal Reference:

  1. Lauren E. McCullough, Sybil M. Eng, Patrick T. Bradshaw, Rebecca J. Cleveland, Susan L. Teitelbaum, Alfred I. Neugut, Marilie D. Gammon. Fat or fit: The joint effects of physical activity, weight gain, and body size on breast cancer risk. Cancer, 2012; DOI: 10.1002/cncr.27433

Cite This Page:

Wiley-Blackwell. "Exercise, even mild physical activity, may reduce breast cancer risk." ScienceDaily. ScienceDaily, 25 June 2012. <www.sciencedaily.com/releases/2012/06/120625065334.htm>.
Wiley-Blackwell. (2012, June 25). Exercise, even mild physical activity, may reduce breast cancer risk. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2012/06/120625065334.htm
Wiley-Blackwell. "Exercise, even mild physical activity, may reduce breast cancer risk." ScienceDaily. www.sciencedaily.com/releases/2012/06/120625065334.htm (accessed October 20, 2014).

Share This



More Health & Medicine News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How Nigeria Beat Its Ebola Outbreak

How Nigeria Beat Its Ebola Outbreak

Newsy (Oct. 20, 2014) The World Health Organization has declared Nigeria free of Ebola. Health experts credit a bit of luck and the government's initial response. Video provided by Newsy
Powered by NewsLook.com
Another Study Suggests Viagra Is Good For The Heart

Another Study Suggests Viagra Is Good For The Heart

Newsy (Oct. 20, 2014) An ingredient in erectile-dysfunction medications such as Viagra could improve heart function. Perhaps not surprising, given Viagra's history. Video provided by Newsy
Powered by NewsLook.com
Ebola Worries End for Dozens on U.S. Watch Lists

Ebola Worries End for Dozens on U.S. Watch Lists

Reuters - US Online Video (Oct. 20, 2014) Forty-three people who had contact with Thomas Eric Duncan, the first person diagnosed with Ebola in the U.S., were cleared overnight of twice-daily monitoring after 21 days of showing no symptoms. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Fauci: Ebola Protocols to Focus on Training

Fauci: Ebola Protocols to Focus on Training

AP (Oct. 20, 2014) Dr. Anthony Fauci, head of the National Institute of Allergy and Infectious Diseases, says he expects revised CDC protocols on Ebola to focus on training, observation and ensuring health care workers are more protected. (Oct. 20) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins