Brisk walking 3 hours a week improves postmenopausal breast cancer survival.

The Women's Health Initiative study conducted at Yale School of Public Health found that postmenopausal breast cancer survivors live longer if they walk briskly for three or more hours per week, compared to survivors who had low levels of activity. This held true even if the women had not been active before their diagnosis.

PositiveTip: Walking regularly is an excellent form of exercise with many health benefits. Try to walk 4-5 times a week for 30 minutes a day. Can't walk for 30 minutes straight? Then walk 10 minutes three times a day. It all counts toward improving your health!

Exercise protects bones strength in older women, but black cohosh makes no difference.

The results of a year-long German clinical trial of 128 postmenopausal women discovered that women who exercise vigorously maintained bone density in their spines, and had a slight increase in density at the hip.

A subgroup of the exercisers who received black cohosh showed no benefit from the herbal supplement. Women who exercised lightly experienced declines in both measures of bone density.

PositiveTip: There is no substitute for regular, vigorous exercise for bone strength, including strength training.