News/Events
Think Healthy | October - November 2009
Exercise: A Good Defense Against Breast Cancer
Physical activity looks like a potent weapon in the fight against breast cancer. Studies show that exercise may be able to cut a woman’s chances of developing this disease by as much as 40 percent.
“Scientists are still debating exactly how much and what type of exercise is best, but what’s clear is that getting up and moving is important for women’s breast health,” says Mary Kennedy, DO, family physician with St. John’s Medical Group.
More Is Better
“Most studies suggest that 30 to 60 minutes a day of moderate-to-high-intensity exercise can help lower breast cancer risk,” says Dr. Kennedy. “It seems, too, that the more frequently and the harder you exercise, the better chance you stand against the disease.” One analysis reported a 6 percent decrease in risk for every hour of physical activity per week.
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Mary Kennedy, DO Family Physician |
Vigorous exercise like jogging or swimming laps may be better at warding off breast cancer than activities like walking or playing golf. But moderate exercise can help, too. One study showed that brisk walking just 1¼ to 2½ hours a week cut risk by 18 percent.
How It May Work
Researchers don’t yet understand exactly how physical activity helps protect women against breast cancer. Dr. Kennedy says that exercise may act in several different ways, including:
- Reducing hormones like estrogen that promote cancer
- Lowering weight and body fat—obesity and overweight are linked to breast cancer
- Regulating insulin and other substances the body produces that encourage tumor growth
- Improving the immune system
Time for your annual mammogram? During the month of October, St. John’s Breast Center is offering extended morning and evening appointments. Call 417-625-2273 to schedule an appointment.