Coach has tricks to prepare Phelps

The first time Bob Bowman met Michael Phelps he knew instantly he had discovered the once-in-a-lifetime swimmer every coach dreams about.

Phelps was just 11 at the time, but Bowman was so excited by his incredible athleticism and untapped potential that he was unable to sleep that night.

"He was so fast he had to swim with older swimmers and because I was a new coach and I wanted to impress them and think I was tough, I gave them an extremely difficult training program," he said on Wednesday in a previously unrevealed look into some of the methods he used to train the most successful Olympian of all time.