"I run at 4 A.M. because I know my opponent is still asleep. It gives me an edge." This was Mike Tyson's response when asked if he really trained every day at dawn. Tyson added, "If I find out one of my opponents runs at 4 A.M., I'll start running at 2 A.M. And if someone trains at 2 A.M., I'll stop sleeping altogether to keep training."

"Without discipline, no matter how talented you are, you’re nothing." – Mike Tyson

In the image, heavyweight champion Mike Tyson is captured running his daily 5-8 km routine, with reporters documenting his intense training in 1987.