Time To Ozzy-cize!

To stay fit for 100 shows a year, Ozzy Osbourne, 53, hired personal trainer Pete Steinfeld, who also trained Madonna. Here, Steinfeld dissects the workout you've seen on MTV's The Osbournes.

Air-Arm Crossovers
"This exercise, with no resistance, results in really nicely shaped shoulders. His tattoos draw your attention there, so you want that area to look good."

Lower Lumbar Stretch
"A limber back helps Ozzy have less pain when he's jumping around on stage. This gives him a good stretch right through his gluteus muscle."

Cross-Lateral Stretch
"We've done a lot of work to make Ozzy taller and stronger, but this exercise is just designed to relax him, align his body and make him feel good."