The review, published in the May 13 edition of the British Journal of Sports Medicine, found that:
• In 76 percent of the studies, physically active women had a lower breast cancer risk; risk reduction was significant in 30 of the 62 studies.
• Among the studies that showed an effect, breast cancer risk was reduced by an average of 25 percent.
• Moderate activity such as walking or leisure cycling brought better odd—a 26 percent reduction—than high intensity exercise—a 22 percent reduction.
• Lifetime activity showed the greatest benefit—greater than that from activity around the time of diagnosis.
• Active postmenopausal women benefit the most. Activity over age 50 showed a greater risk reduction that activity in adolescence and early childhood.
• Thin is best, but only when associated with exercise. Women with a BMI of less than 22 had 19 percent greater risk reduction than women with a BMI above 25. (See the link on the left to compute your BMI.)
• A high BMI cuts the effect. Women with a BMI over 30, even if they are active, had no risk reduction from exercise.
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Read more about TNBC in my book, Surviving Triple-Negative Breast Cancer.
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