News release: “Adults gain substantial health benefits from two and a half hours a week of moderate aerobic physical activity, and children benefit from an hour or more of physical activity a day, according to the new Physical Activity Guidelines for Americans. The comprehensive set of recommendations for people of all ages and physical conditions was released today by the U.S. Department of Health and Human Services…The Physical Activity Guidelines for Americans are the most comprehensive of their kind. They are based on the first thorough review of scientific research about physical activity and health in more than a decade. A 13-member advisory committee appointed in April 2007 by Secretary Leavitt reviewed research and produced an extensive report.”