Green Zone Rewards (image) Lifespan Caption Sample rewards that study participants in the green zone received. Credit Weight Control & Diabetes Research Center - The Miriam Hospital/Brown Medical School Usage Restrictions Only in conjunction with Stop Regain stories. 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.