Wednesday Bubble: breast cancer during menopause- move your body

Posted by Liz on Oct 7, 2009 in breast cancer, exercise | 0 comments

[Credit: Stephen diFilipo, Fountain at the Gaylord Hotel, National Harbor ©2009. With permission]

October is National Breast Cancer month. In honor of family and friends who have survived breast cancer, I am dedicating this month’s Bubbles to posting choice bits of information about the topic this month. I admire these women greatly – for their strength, their tenacity and their hope. Rock on ladies!

Nothing like a bit of good news to kick off the month!

Early this year, I wrote about a study showing that exercise could help reduce breast cancer risk. Today’s post provides evidence that the timing and intensity of that activity makes a huge difference.

In this study, which appears in BioMed Central Cancer, researchers examined and compared the relationship of light physical activity to moderate to vigorous activity and its association to breast cancer risk in 118,699 women in menopause. Activity levels were studied during four periods of life: ages 15 to 18, ages 19 to 29, ages 35 to 39 and the past 10 years. Light activities included bowling, golf (riding in a cart), table tennis, slow walking/slow dancing, light calesthenics, light gardening, fishing, horseshoes/croquet and light housework. Moderate-to-vigorous activities included tennis, golf (walking), biking, swimming, heavy gardening, weight lifting, basketball/baseball, football/soccer, cheerleading/drill team, handball/raquetball, hiking/mountain climbing, fast walking/fast dancing, rowing, aeroboics, jogging/running and heavy housework.

The researchers found no association between activity intensity and breast cancer risk in the time periods leading up to menopause. However, Women engaging in more than 7 hours per week of  moderate to vigorous activity during the past 10 years had a significant, 16% lower risk of developing breast cancer compared to women who were inactive or only engaged in light activity. This benefit remained even when the researchers took factors such as age, body mass index, family history, or hormone use into consideration. The type of tumour cancer stage also had no effect.

Although researchers have been aware that a high versus low level of physical activity may protect against developing breast cancer during menopause, this is the first study to actually examine activity during other time periods and then compare them to more recent time periods.

Clearly, it’s time to move your body if you’ve not been doing so. A 16% reduction in breast cancer risk is significant.