John Bellettiere (IMAGE) University of California - San Diego Caption John Bellettiere, Ph.D., M.P.H. senior author and assistant professor of epidemiology at the Herbert Wertheim School of Public Health and Human Longevity Science at UC San Diego, and colleagues wanted to know whether 10,000 steps a day is necessary for people to reduce their risk for diabetes. Credit UC San Diego Usage Restrictions For use with news release License Original 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.