Anthony Joshua is hard at work whipping himself into shape ahead of his April 29th bout with Wladimir Klitschko. The 2012 gold medal winner shared a photo on his Instagram page after a training session, showing off a huge upper body. He captioned the photo: 'Working out on the heavy bag.' Joshua is undefeated in 18 professional fights but he is up against the experience of Klitschko
who has racked up 64 wins in a 21-year career. Joshua is unfazed though, he recently predicted he'll defeat the big Ukrainian via knockout.