Iris Kyle 🇺🇸 1st @ 2004 Ms. Olympia (WBB)

2004

Iris Kyle winning the 2004 Ms. Olympia. The IFBB issued its 20 percent rule the same year, a directive asking female athletes to decrease muscularity by a factor of 20 percent. It was contested by competitors, not least because nobody defined 20 percent of what.