Russell Brand takes up urban climbing

British funnyman Russell Brand has taken up urban climbing and free running as a new hobby.

The Forgetting Sarah Marshall star admits he has adopted the unusual exercise regime, which involves clambering over buildings and running through strange spaces, to keep fit, but insists he does not invade private gardens or homes.

He tells News.com.au, "It's basically trespassing, not going in people's personal properties but urban climbing, free running in straight lines. All that business. But it's not instead of sex, I don't ejaculate when I'm doing it, it's just a reclamation of my personal freedom."