Bollywood superstar Shah Rukh Khan says that though he has been grappling with injury problems, he is fit enough to do an action film. <br /> <br />"When I was doing 'Chenani Express' I was injured, but I did it. It hurts a little, troubles you a bit, you need to be careful. If I am offered an action film, I will do it. There is no big deal about it. I am fit enough to do an action film again," Shah Rukh said here yesterday. <br /> <br />"I never wanted to be muscular. Everybody has a body type. I have nice, lean long muscles. I am happy with them. I don't like to show off. By March I need to be thin, I want to do it. I am working out everyday. I want to be fit," he said. <br /> <br />The Bollywood superstar was speaking at the launch of Deanne Panday's fitness book 'Shut Up and Train'. "The book has strong message -- don't look for excuses to not work out, start training. Like I finish shooting at 10 or 11 pm, I come home, put the kids to sleep, have dinner, spend time with family. And then at 2.30-3 AM I work out. My trainer pushes me to keep training whenever I get time, but (do it) everyday," he added. <br /> <br />Due to the number of injuries SRK has suffered, he does find difficulty while doing some sort of exercises. <br /> <br />"I can't do over head and shoulder exercise at all. Because of my spinal injury, I can't do a lot of things. I used to love doing pull ups, but I now can hardly do three-four. I can't do exercise with bars. As soon as I stretch my arms, I can't balance things. I can't lift too much weight," he said.