Robert Pattinson Used The 'Sipping Diet' To Whip His Body Into Shape For 'Batman' Role

Robert Pattinson took the role of the iconic Batman extremely seriously.

After preparing for the title role in his latest film, The Batman, the 35-year-old opened up about how he got his body into tip top shape to play the infamous character.

Pattinson admitted that as the days leading up to filming his topless scenes drew closer, he became overly cautious about what he was putting in his body. "You just cut down and cut down and cut down before the couple of scenes with your shirt off, and you're counting sips of water," he told People of his water and food intake.

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The Twilight actor dished that it took him months to get his physique, thanks to a strict diet and workout regime, for the role that has previously been played by the likes of Ben Affleck and Christian Bale.

However, the diet Pattinson used — also known as the "sipping diet" — has severe repercussions. Dr. Nadja Auerbach, a Doctor and Clinical Operations Associate at Thriva, told The Sun: "Restricting water intake is not a safe nor a sustainable solution for weight loss."

"It is a method that can result in drastic, short term weight changes, due to water loss rather than fat loss, and can be very dangerous," the medical physician explained to the outlet. "By reducing the amount of subcutaneous fluid (fluid stored under the skin), muscles appear more defined."

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"Typically, athletes will significantly increase their water intake in the days leading up to the event," Auerbach noted of the diet practice. "This causes the body to begin up-regulating the amount of water lost by excretion."

"They will then suddenly and drastically cut this water intake, but as there is a delay before the body is able to adjust to this, one continues to excrete water at the accelerated rate," the doctor added, while mentioning that complete dehydration of the body does not work for every body type to yield the best results.