Sheila is considered by many to be one of the greatest athletes in history and is one of only a handful to have ever risen to the top in three separate sports. After a successful swimming career, which included a gold medal at the Atlanta Olympics in 1996, Sheila made the move to triathlon. She won silver at the 2003 Pan American Games, gold at the 2004 ITU World Championship, and earned podium finishes at 10 ITU World Cups - including three wins.