I also know that in the second movie, the sequel, Eric made some huge advances with the robot suit. That just made it even better. You put the suit on and moved your arms then the robot's arms would move in sync with yours.
I try to work out with my personal trainer for an hour, four times a week - we mainly concentrate on weights and running. If I'm on the road I sometimes do DVD work-outs in my hotel room - P90X and Insanity are a couple of my favourites.