Mark Wahlberg only pretends to act tough when training for his action films.The Oscar nominated actor, who is currently starring in 'Shooter' as a marine sniper and is also training to play boxer Mickey Ward in 'The Fighter', hates gruelling exercise because he is lazy. Mark told BANG Showbiz: "I didn't enjoy training at all. I pretend to, I act like I enjoy it but I'm pretty lazy."It's something I do not look forward to - getting up at five every morning to have some guy scream at you. It is not my idea of fun."The 35-year-old star also revealed he was bullied by the marines who trained him to be a sniper for his latest film. He said: "It was very tough. Once you're on their turf you're dealing with real marines and they like to push you around a little bit."They like to test you out and see if you are going to call your agent. But I toughed it out."