Yang Bai, Iowa State University (IMAGE) Iowa State University Caption A study by Iowa State graduate research assistant Yang Bai reinforces the need to get children active at an early age. Credit Christopher Gannon, Iowa State University 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.