Icaros: Flight Simulator Home Trainer (IMAGE) German Sport University Caption The test subjects flew over virtual mountain ranges and were expected to navigate through 63 rings, which required a change in their centre of gravity. Credit German Sport University (Overbeck) 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.