Henry Cavill will be starring as Superman in the next film, Superman: Man of Steel. It is following the trend of Batman and Spiderman as yet another prequel movie telling the story of the early years, much in the way of Smallville.
He actually spent 5 months training intensively with cardiovascular workouts, bodyweight training and a lot of mixed martial arts training (MMA) which really amounts to a low of old school fitness training and boxing workouts. For a while he was working out 7 hours a day with this type of exercise. This really set him up well for the Superman training workouts which followed.
The weight training for this role sees him lifting weights for 2-3 hours a day. His workouts involve cycling through various different weight training exercises throughout that week to encourage all of his muscles to grow. Henry actually was already bulking up during the preparation for Immortals which vas also produced by the 300 team.
The 300 workout, which Cavill may or may not have done, uses a type of training called circuit training.
Circuit training, in the simplest sense, is grouping together a bundle of challenging movements that work the entire body into a circuit. An exerciser would complete one movement, then move on to the next, and so on and so on until the circuit is complete. This circuit can then be redone a number of times, depending on how challenging a workout the exerciser wants.
In my own experience, I have found circuit training to be very effective and at the same time, very time-saving. An example of a challenging fat-loss based circuit, in my opinion, would choose an exercise for each major area of the body, and use those to circuit train.
So here's a list of common exercises:
Front Squat
Back Squat
Deadlift
Sprint
Lunge
Burpee
Bench Press
Cable Chest Press
Push Up
Shoulder Press
Dip
Row variations
Inverse Row
Pull up
From this list, I would make sure I understood proper form and could complete the movement safely, and then choose one exercise for each major muscle group. A very simple circuit could be sprints, pull ups and push ups. I would set a time or rep count (reps are harder with sprints), and complete the workout.
30 second sprint
30 seconds of pull ups
30 seconds of push ups
Repeat 5-8 times
This is just an example; there are plenty of other challenging combinations that could be useful. Remember, the most important thing when it comes to the Henry Cavill workout and every workout in general is form! Learn to do the exercise before you actually do it!
