Treadmill - Lead Photo (IMAGE) UT Southwestern Medical Center Caption Research coordinator Marcel Turner (left) watches as Tammy Lewis, a nurse who works at the Institute for Exercise and Environmental Medicine, tests an exercise program being used for a national study to evaluate methods to prevent declines in brain function. Credit UT Southwestern 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.