"They expect you to pick you up and throw you down. That was the most difficult part. When a wrestler trains he trains for 2-3 hours and then 2-3 hours again in the evening, then training for MMA, and 6-7 hours of shoot every day non-stop, fighting non-stop. So those six hours in those lights and training, that used to take a toll," Salman said, at the trailer launch of the film.