"It's probably the most intense training programme that I have been through to get in that kind of shape for 'Ram ji ki chaal'. It's well worth it now that I see it on screen," the 28-year-old said in a video of the making of the song.
"I am very happy that I looked like that at least once in my life and that it is imprinted on celluloid," he added.
Deepika Padukone stars opposite Ranveer in this romantic action drama, directed by Sanjay Leela Bhansali.
Set in Gujarat, "Ramleela" also stars Gulshan Devaiah and hits theatres Nov 15.
