What fuels a guy like McMahon, what powers him through twenty hour days? The answer is tuna fish. Wrestlers have said that his office stinks of Tuna, and you can even smell it on him when he's out and about at arenas. He eats a lot of it, mainly for bodybuilding purposes. Several tins a day is normal for him, as he looks to maintain a strong protein intake. "I get a lot of enjoyment by training. Nutrition goes with it. I train for my headnot my body. The ancillary benefits are that I'm healthy as a horse. It really does clear my head." McMahon told Bloomberg Businessweek. His healthy approach to diet and fitness has been a big part of his longevity. If you eat bad and don't work out, chances are you end up overweight and tired. Your brain suffers as well, becoming more sluggish. By having such an intense focus on health, McMahon is managing to operate on a level that most men even half his age can't.