Lucas Carr (IMAGE) University of Iowa Caption Lucas Carr, associate professor in the Department of Health and Human Physiology, is a co-principal investigator of a study published in the Journal of of the American Medical Association detailing how making fitness a game can increase activity levels. Credit Tim Schoon, University of Iowa 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.