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It might not be a surprise to anyone who has ever used strong language in a difficult situation as part of their natural strategy for getting through it, but scientists have tested it.
They had people repeat swear words and perform physical tasks, like riding exercise bikes and squeezing hand grips. Compared with people who didn’t swear, those who used strong language had higher performance.
The research was done by Richard Stephens, a psychologist at Keele University.