Members of American heavy metal band Metallica say they won't perform into their 70s like The Rolling Stones.
The heavy metal band, made up of James Hetfield, Rob Trujillo, Lars Ulrich and Kirk Hammett, are in their 50s and admit their intense sets take a massive toll on their bodies, reports contactmusic.com.
''I saw the Stones last year in San Francisco and I thought they played great, and for a bunch of guys who are 70-plus, it was a pretty amazing feat," said Hammett.
''I don't know if we can do what we do when we're in our 70s, because playing one of our songs is equal to playing eight Stones songs in terms of physical energy and intensity," added the 51-year-old.
The guitarist hopes the band can work out a plan which means they can play for the next 20 years but he's not very hopeful.
''I personally think we have another 10. Maybe that's one album, maybe that's two albums, I don't know," he said.