Gerard Butler has admitted how being an action man can be quite draining, both physically and emotionally.
The Olympus Has Fallen star revealed that although he gets a high from doing the stunts and fight scenes, they are sometimes very gruelling to shoot.
"Physically, you do those movies and you know you're signing up for a challenge. You gotta get pumped up, get big, look cut and athletic, and then you gotta get into the fight. You're training, you're doing all the choreography while you're trying to film and I'm training at the gym," he said.
The Scottish actor said the preparation is just the beginning.
"And then you get into the fight sequences. I had one fight sequence, which alone was three days of fighting, and every time you're doing that, when you get to a take, you gotta get back into the space that you are in so you're exhausted," he continued.
"You probably do about 200 takes, sometimes in a day, or especially over a couple of days. You get beaten up but that's part of it. By the way, that's the fun part of it in a way. The visceral, the experience and the adrenalin of making an action movie is very rewarding."
Gerard, who plays disgraced Secret Service agent Mike Banning in Olympus Has Fallen, said he has always held people in those roles in high regard.
"I always had respect for the guys in the army, police or security because you don't get into that position without being very accomplished, brave or dangerous. Those guys are bad a****, no question about that," he said.
Aaron Eckhart and Morgan Freeman also star in Olympus Has Fallen, which is out now.