India, Feb. 17 -- Hollywood star Bradley Cooper meditates in freezing temperatures as soon as he wakes up as it helps him stay focused.

"James Nachtwey (a photographer commissioned by the Times) asked me if there are any rituals I do to prepare for a role. I said not really but mentioned that I do cold plunge every morning when I get up," Cooper told The New York Times.

Cooper made the admission as part of a piece by Nachtwey that saw him photograph A-listers doing what they loved away from film sets.

The 'A Star is Born' actor added about the shoot that saw him captured swinging a hammer in the snow before he took a cold plunge: "We were outside next to a creek, and we looked at each other and thought, 'OK? Let's give it a shot.'"

"I...