Alison Phillips, Iowa State University (IMAGE) Iowa State University Caption Alison Phillips' study is the first to explore the importance of different habit components in predicting exercise frequency. 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.