Arnold Schwarzenegger started lifting weights when he was just 15
Wow, that's young!  Did he enter any weight lifting competitions?
Arnold Schwarzenegger
Arnold Alois Schwarzenegger (; ; born July 30, 1947) is an Austrian-American politician, actor, filmmaker, and former professional bodybuilder. He served as the 38th Governor of California from 2003 to 2011.
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
on 26 June 1943 (he was a twin). He started lifting weights at the age of 16. He married Christine (née Mason) in 1967 who went on to become Miss Universe Bikini. Grant moved near Venice Beach, California in the early 1970s where he trained at Gold's Gym with Arnold Schwarzenegger. Schwarzenegger became Grant's friend and they appeared in the 1976 documentary "Pumping Iron" together. While in California Grant worked for Joe Weider.
Grant moved back to Swansea where he ran a health food