We trained at the world's most famous boxing gym with the man who...

We trained at the world's most famous boxing gym with the man who has trained 19 world champions - here's what it was like Gleason's Gym in Brooklyn, New York is arguably the world's most famous boxing gym, having trained everyone from Muhammad Ali to Floyd Mayweather Jr. Anyone can train at Gleason's Gym - most of the members today are regular New Yorkers learning how to box We trained with Hector Roca, who has trained 19 world champions along with actors like Hilary Swank and Wesley Snipes