Olympics: Mary Lou Retton on how gymnastics have changed1984 Olympic gold medal gymnast Mary Lou Retton discusses the major changes in gymnastics over the years.SI Staff|Share on FacebookShare on XAdd us on 1984 Olympic gold medal gymnast Mary Lou Retton discusses the major changes in gymnastics over the years.Published Aug 17, 2016 | Modified Aug 17, 2016SI STAFFShare on FacebookShare on XHome/Olympics