American Ninja Warrior Kacy Catanzaro's Abs Need to Be Seen to Be Believed

Kacy Catanzaro made headlines — and history — when she became the first woman to advance to the finals on the popular TV competition show American Ninja Warrior. At five feet tall and 100 pounds, Kacy has proven that strength comes in all sizes and has quickly become a source of fitness inspiration to men and women everywhere. The New Jersey native and former gymnast is coached by her boyfriend (and fellow American Ninja Warrior competitor), Brent Steffensen, and frequently takes to social media to share sweet PDA pictures, workout tips, and, of course, envy-inducing ab photos. We've rounded up Kacy's hottest snaps here; scroll through to see them all now.Source: Instagram user kacycatanzaro