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Moderate Exercise May Lower Cold Risk

Study Shows a Brisk Walk a Day May Keep the Common Cold Away
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WebMD Health News
Reviewed by Louise Chang, MD

Oct. 26, 2006 -- Women who want to reduce their sniffling and sneezing this winter may want to lace up their walking shoes and get moving.

A new study shows postmenopausal women who exercised regularly lowered their risk of coming down with colds compared with more sedentary women.

Researchers found the protective effects of moderate exercise, like brisk walking, on preventing colds also appeared to increase over time. By the end of the yearlong study, nonexercisers had three times the risk of colds than women who exercised regularly.

"This adds another good reason to put exercise on your to-do list, especially now that cold season is here," says researcher Cornelia Ulrich, PhD, of the Fred Hutchinson Cancer Research Center in Seattle, in a news release.

It's the first yearlong clinical trial to look at the effects of moderate exercise on fighting the common cold and suggests regular physical activity can boost the body's immune system and prevent infection. But experts say further research will be needed to confirm these results.

Walk Away From Colds

In the study, published in The American Journal of Medicine, researchers divided 115 previously overweight or obese and sedentary postmenopausal women into two groups. They were all nonsmoking women.

One half was asked to engage in moderate exercise at home or at a gym for 45 minutes a day, five days a week. Among the exercise group, brisk walking was the activity of choice for most of the women. The other half of the women acted as a comparison group and participated in a 45- minute stretching session once a week.

During the study, the women recorded their exercise habits and any episodes of allergies, colds, and other upper respiratory infections, such as flu.

The results showed that over the course of the year, the risk of colds decreased among exercisers and increased modestly among the nonexercisers. Overall, 48% of stretchers had at least one cold during the study compared with 30% of exercisers.

By the last three months of the study, the risk of colds was three times higher among nonexercisers.

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