Swinton learned her stunts from a group of martial artists including Julian Daniels. He taught her hand movements.
"It was like being at a most delicious school. We were learning all these things that we would never otherwise have learned. You want to do something that draws on certain disciplines or certain traditions but at the same time you want to do something that's never been done before," the actress said.
"You want to make it original and the fight directors have done a phenomenal job of creating a particular style of fighting that only people who have studied under The Ancient One in Kamar-Taj will know," she added.
"Doctor Strange", starring Benedict Cumberbatch as a former surgeon turned Sorcerer Supreme.
The movie, co-written/directed by Scott Derrickson of "The Exorcism of Emily Rose" and "Sinister" fame, releases on November 4.
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