IH: With the work you are doing on that project, how did you prepare for the tour?
SVZ: With previous tours, I’ve always boxed for a couple of months. I figured out that one round of boxing equals about 15 minutes on stage. You try and build up your endurance and get to about 12 rounds. Twelve rounds equals about three hours on stage. Anything more than that, your adrenaline's going to take over anyway.For pure endurance, I found that boxing is the closest thing to rock and roll.