20-year-old Athing Mu is already the FASTEST 800m runner in the world, but she's just getting started. Here's how she's preparing for even MORE world title and Olympic gold medals! SUBSCRIBE to Whistle for more awesome videos! - goo.gl/y2JNsG Still want more Whistle? Follow us on: TIKTOK: tiktok.com/@whistle INSTAGRAM: instagram.com/whistlesports TWITTER: twitter.com/whistlesports FACEBOOK: facebook.com/whistlesports WHAT IS WHISTLE? Whistle creates uplifting sports and entertainment content highlighting incredible athletes, amazing entrepreneurs and future stars. Our flagship series include No Days Off, My Hustle & Dunk League and we've feature talent like Patrick Mahomes, Trae Young, Ja Morant, Karl Anthony Towns, A'ja Wilson, Cooper Kupp, Kyrie Irving, Snoop Dogg, Joel Embiid, G-Eazy, Trea Turner & J.R. Smith! Visit us at teamwhistle.com and COMMENT below with what you want to see next!