A study among breast cancer survivors found that runners who ran 2.25+ miles per day had a 95% reduced risk of breast cancer mortality, while walkers didn't show any significant reduction in risk. Previous larger-scale studies have found health benefits for both walking or running among breast cancer survivors. More research is needed to know if walking faster or longer might confer the same survival advantages.
PositiveTip: Ladies, exceed the recommended 2.5 hours per week of moderate physical activity to improve your odds of beating breast cancer.