Men’s Health came to the conclusion that Phelps, arguably the greatest American Olympian of all time, was befit to wear the crown of fittest man of all time based on a number of items – including his five hour workout regimen, and of course the achievements Phelps was able to accomplish with the body he built.

Phelps talked to Men’s Health about some of his workouts during the height of his swimming powers. “I was doing 10 workouts a week in the pool, three weight workouts plus three core workouts,” he said. “It was totally intense.”