The American Heart Association is seeking nominations for its annual Lifestyle Change Award. The award recognizes individuals who have made positive changes to improve their quality of life and health over the past year, such as losing weight, becoming active, eating healthier or managing chronic diseases such as diabetes and cholesterol. The winner will be announced at the annual Des Moines Heart Walk on June 16, at the state Capitol and honored by the American Heart Association and the Des Moines 2012 Lifestyle Change Award sponsor, U.S. Bank. The winner will receive a $150 U.S. Bank Visa Gift Card. Online nominations may be made at www.DSMHeartWalk.org by June 1.