As women age, they may be looking for ways to keep their brain as sharp and healthy as possible.

New research suggests that the answer may be just outside the front door: physical activity. A study published in the journal Neurobiology of Aging found that physical fitness benefits brain function.

The Canadian study, conducted among older women, found that exercise increased blood flow to the brain, which in turn improved cognition.

Researchers observed two groups of women – those who participated in regular aerobic activity and others who were not physically active.

They found that the active group had lower blood pressure, both while exercising and when resting, as well as higher vascular responses in the brain. This group also scored an average of 10 percent higher on cognitive tests.

“This study proves for the first time that people who are fit have better blood flow to the brain,” commented Marc Poulin of the University of Calgary. “Our findings also show that better blood flow translates into improved cognition.”

Older women may also want to consider taking nutritional supplements containing omega-3 fish oil, which has been shown to help protect brain functioning.