Gait Speed and Aging (IMAGE) Duke University Caption A long-term study has found that signs of aging may be detected by a simple walking test at age 45, and that the brains of slower walkers were different at age 3. Credit Duke University Communications Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.