I saw a study with people holding their hands in ice water split into three groups. People that had to stay quiet pulled out first on average. Those that were allowed to yell were able to withstand for longer. The third group was able to yell swear words and was able to last longer than the yellers without swearing. Yelling increased the pain threshold for those in the study.
Now if I’m able to guess I’d bet we notice over time that we feel better when we yell and train ourselves to do it subconsciously.
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