The intense "Man of Steel" workout described by Henry Cavill as "hell and wonderful at the same time" has finally been revealed as part of a promotional tie-in with The National Guard. 

The 30-year-old British Actor is shown throughout the short video performing a variety of exercises to get him into Superman shape - all courtesy of fitness expert Mark Twight. 

"Mark Twight is probably one of the most incredible people I’ve ever met," Cavill says.  “He’s opened my eyes to seeing past what I thought were my limits. He’s a remarkable man, truly.

“He understands what I’m going through physically. He understands me because he sees what I’m going through as a person, which I think is what makes him such a good trainer.”

As mentioned earlier, Cavill's training regimen included bulking up with a 5,000 calorie diet five months before shooting. The actor was then told to cut his calorie intake in half in order to sculpt the fat he had put on into muscle. 

"You’ve got to eat protein first, then a little bit of carbs … you’ve gotta keep your hunger levels going," he told Total Film. "I’m training two and a half hours a day, pushing my body beyond its normal limits, putting on a lot of muscle mass and just making myself look like Superman.”

After being so disciplined for the better part of a year, Cavill says he rewarded himself with apple pie, a tub of ice cream, and a full pizza. 

You can check out his "Man of Steel" workout in the video below. 

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Henry Cavill's 'Man of Steel' workout video
Actor's grueling physical fitness regimen to become Superman spotlighted in this National Guard tie-in.