G-Trainer (IMAGE) University of Colorado at Boulder Caption A new CU-Boulder study led by Associate Professor Rodger Kram, pictured here, shows that a space-age, low-gravity training device can vastly reduce the impacts of running on the joints of study subjects. Credit Casey A. Cass, University of Colorado 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.