Russell Crowe thinks he is too old to be an action hero.The 42-year-old star has confessed he is too worn out to perform dangerous stunts in his movies and is on the look out for more sedate roles. Crowe said: "Now that I'm getting a little bit older the bones are creaking and the Achilles tendons don't work the way they should."I don't approach everything with the same intensity that I used to."The burly actor has tackled some gruelling action roles including a Roman warrior in 'Gladiator', a sea captain in 'Master and Commander' and a boxer in the critically acclaimed 'Cinderella Man'. Although Crowe is ready to walk away from action roles some of his ageing Hollywood rivals are going back to the genre that shot them to fame. Bruce Willis, 51, is making a fourth 'Die Hard' film, 64-year-old Harrison Ford is starring in a fourth 'Indiana Jones' movie and Sylvester Stallone, 60, has laced up his gloves one more time for a sixth 'Rocky' movie.