Rocker Tommy Lee has figured out how he stays in such great shape - his MOTLEY CRUE shows are the equivalent of jogging 13 miles at a time.

The 42-year-old drummer performs for two-and-a-half hours every night he plays with the reformed rockers and he recently decided to see just what sort of a work-out that amounted to.

He explains, "I was curious one day. I've seen those odometers for joggers that you clip on your shoe and it tells you how many miles you're going.

"I clipped it on my shoe and after a two-and-a-half hour show it freaked me out.

"I took it off my shoe and it said 13 miles... That's both feet, both arms. It keeps me in shape."