Schwarzenegger began lifting weights at the age of 15. He won the Mr. Universe title at age 20 and went on to win the Mr. Olympia contest seven times, remaining a prominent presence in bodybuilding and writing many books and articles on the sport. The Arnold Sports Festival, considered the second most important professional bodybuilding event in recent years, is named after him. He is widely considered to be one of the greatest bodybuilders of all time, as well as the sport's most charismatic ambassador.